-------------------------------------------------------------------------------------------------------------
Answer: \(\textsf{2i and -2i}\)
-------------------------------------------------------------------------------------------------------------
Given: \(\textsf{x}^2\textsf{ + 4 = 0}\)
Find: \(\textsf{The value of x}\)
Solution: In order to find the value of x we must isolate x by itself and it will produce the result. In this case we need to subtract 4 from both sides and square root both sides in order to isolate x.
Subtract 4 from both sides
\(\textsf{x}^2\textsf{ + 4 - 4 = 0 - 4}\)\(\textsf{x}^2\textsf{ = 0 - 4}\)\(\textsf{x}^2\textsf{ = - 4}\)Square root both sides
\(\sqrt{\textsf{x}^2}\textsf{ = }\sqrt{\textsf{- 4}}\)\(\textsf{x}\textsf{ = }\sqrt{\textsf{- 4}}\)\(\textsf{x}\textsf{ = }\sqrt{\textsf{ 2}^2\textsf{ * (i)}^2}}\)\(\textsf{x}\textsf{ = }\pm\textsf{2i}\)After completing all of the step we are able to determine that x is equal to both 2i and -2i.
Solution :
Given,
x² + 4 = 0Aim :
To find value of x.Inorder to calculate the value of x we would transpose the 4 which is in L.H.S. to R.H.S. (Remember that sign would be changed in negative).
>> x² = -4
>> √x² = √-4
>> x = ±2
Therefore,
Value of x is 2 and -2.convert the number into a scientific notation
hep me with this question
will give brainliest
Answer:
a) \(f(x) = x + 9\)
b) 59 positive workers (FOR DAY 70)
c) Day 10
Step-by-step explanation:
X = Days
Y = Positive workers
When Gerald started on his trip, his odometer read 109,875. At the end of his trip it read 110,480. How many miles did he travel? Explain how you got your answer.
Answer:
its 605 miles
Step-by-step explanation:
If we take 110,408 and subtract 109,875 then it should equal 605
Answer:
Step-by-step explanation:
109,875
=605
-110,480
Mark brainliest please if the answer is correct
Vincent makes salad dressing by mixing 2 cups of olive oil with every cup of vinegar.
Problem
Which of the following three ratios are equivalent to the ratio of oil to vinegar?
A 18:6
B 8:4
C 20:10
D 30:15
E 21:4
B,C,D
Step-by-step explanation:
Answer:
eda periodt
Step-by-step explanation:
Find out the length of segment GF?
The length of segment GF in the triangle is 8 inches
How to Find out the length of segment GF?From the question, we have the following parameters that can be used in our computation:
The triangle
On the triangle, we have the following ratio
3 : 6 = 4 : GF
So, we have
GF = 6/3 * 4
Evaluate
GF = 8 inches
Hence, the length is 8 inches
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PLEASE help me i cannot understand can someone help me with this
for the bottom ones I assume you substitute x for the numbers in the table, such as 2•0 and 2•1
A forest covers 62,000 acres. A survey finds that 0.3% of the forest is old-growth trees.
I need help please with this equation:
Answer:
y=-3x+2
Step-by-step explanation:
6. What is the value of −3 • (7 + (-3)²) ÷ 3? (1 point)
O13
0-2
O-16
O-48ہے
Answer:
\(-16\)
Step-by-step explanation:
\(-3 \cdot (7+(-3)^2) \div 3\)
To simplify this expression, use the order of operations (PEMDAS):
P arentheses
E xponents
M ultiplication
D ivision
A ddition
S ubtraction
First, simplify what is in the parentheses.
\(7 + (-3)^2\)
Remember that any number squared ( \(\Box ^2\) ) is positive, so:
\((-3)^2 = 9\)
Therefore,
\(7 + (-3)^2\)
\(= 7 + 9\)
\(= 16\)
We can now replace the parentheses in the original expression with 16.
\(-3 \cdot (7+(-3)^2) \div 3\)
\(= -3(16) \div 3\)
Finally, simplify by multiplying and dividing.
\(-3(16) \div 3\)
\(= -48 \div 3\)
\(= -16\)
HELP
Determine if the sequence below is arithmetic or geometric and determine the
common difference / ratio in simplest form.
4, 20, 100
Answer:
Step-by-step explanation:
a₂ - a₁ = 20 - 4 = 16
a₃ - a₂ = 100 - 16 = 84
Since a₂ - a₁ ≠ a₃ - a₂, the sequence is not arithmetic.
a₂/a₁ = 20/4 = 5
a₃/a₂ = 100/20 = 5
Since a₂/a₁ = a₃/a₂ = 5, the sequence is geometric with a common ratio of 5.
Which expression is equivalent to 0.2n + 2n + 4?
6.2n
2.2n + 4
4n + 4
2.2(n+4)
Answer:
2.2 (n+4)
Step-by-step explanation:
g if f is uniformly continuous on a~ r, and fl(x)l > k > 0 for all x e a, show that 1/f is uniformly continuous on a.
It is shown that for any ε > 0, there exists a δ > 0 such that |x - y| < δ implies |1/f(x) - 1/f(y)| < ε/(2kM) for all x, y in a. This proves that 1/f is uniformly continuous on a.
What is uniformly continuous?
Uniform continuity is a property of a function in which for any given value ε > 0, there exists a corresponding value δ > 0 such that for all pairs of points in the function's domain whose distance is less than δ, the difference in the function's values at those points is less than ε. In other words, a function is uniformly continuous if its rate of change does not vary significantly over its entire domain, and small changes in its input result in correspondingly small changes in its output.
To show that 1/f is uniformly continuous on a, we need to prove that for any ε > 0, there exists a δ > 0 such that |x - y| < δ implies |1/f(x) - 1/f(y)| < ε for all x, y in a.
Given that f is uniformly continuous on a, we know that for any ε > 0, there exists a δ > 0 such that |x - y| < δ implies |f(x) - f(y)| < ε/k for all x, y in a.
We also know that |f(x)| > k for all x in a.
Using these facts, we can begin by manipulating the expression |1/f(x) - 1/f(y)|:
|1/f(x) - 1/f(y)| = |(f(y) - f(x))/(f(x)f(y))|
Since |f(y) - f(x)| < ε/k, we can substitute this into the above expression:
|1/f(x) - 1/f(y)| < |(ε/k)/(f(x)f(y))|
Now, we need to find a way to relate f(x)f(y) to |x - y|.
Since f is uniformly continuous, we know that for any ε > 0, there exists a δ > 0 such that |x - y| < δ implies |f(x) - f(y)| < ε/k for all x, y in a.
This implies that |f(x)f(y)| < k(f(x) + f(y)) < 2kM, where M is the supremum of |f(x)| over a.
Thus, we have:
|1/f(x) - 1/f(y)| < ε/(2kM)
Therefore, we have shown that for any ε > 0, there exists a δ > 0 such that |x - y| < δ implies |1/f(x) - 1/f(y)| < ε/(2kM) for all x, y in a. This proves that 1/f is uniformly continuous on a.
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In a set of three lines, a pair of parallel lines is intersected by a transversal. The intersection forms eight special angles.
Two of the special angles, A and B, are corresponding angles.
For the set of parallel lines intersected by a transversal, A = 4x and B = 2(x+14).
1. Use an equation to represent the corresponding angle relationship between A and B.
2. Use the equation to find the measures of A and B.
PLEASE HELP!!! Will mark brainliest and give thanks:)
Answer:
a.) 4x = 2(x + 14)
b.) Measure of A = 56°
Measure of B = 56°
Step-by-step explanation:
We know that,
When two lines are crossed by another line transversal line , the angles in matching corners are called corresponding angles.
Also,
When two lines are parallel then the Corresponding Angles are equal.
Given that,
A = 4x and B = 2(x+14).
i.e.
∠A = 4x and ∠B = 2(x+14)
a.)
Now,
As A and B are parallel
So,
∠A = ∠B
⇒4x = 2(x + 14)
(This is the equation that represent the corresponding angle relationship between A and B.)
b.)
Now,
⇒4x = 2x + 2(14)
⇒4x = 2x + 28
⇒4x - 2x = 28
⇒2x = 28
⇒x = 14
So,
we get
∠A = 4(14)
= 56
⇒∠A = 56°
and
∠B = 2(14 + 14)
= 2(28)
= 56°
⇒∠B = 56°
∴ we get
Measure of A = 56°
Measure of B = 56°
A grain silo is shaped like a cylinder. The diameter is 10 yards and the height is 25 yards. If the silo is 60% filled, what is the volume of grain in the silo? Round to the nearest tenth.
The volume of grain in the silo when it is 60% filled is approximately 1178.1 cubic yards.
What is Volume?A closed surface or object's volume is determined by its three dimensions and is represented mathematically.
The following formula determines a cylinder's volume:
V = πr²h
where r is the radius of the cylinder and h is the height.
The diameter of the silo is 10 yards, so the radius is 5 yards. The height of the silo is 25 yards.
To find the volume of the silo, we need to first calculate its total capacity, which is the volume of a completely filled cylinder:
V_total = πr²h
V_total = π(5²)(25)
V_total = 625π
To find the volume of grain in the silo when it is 60% filled, we need to find 60% of the total capacity:
V_grain = 0.6V_total
V_grain = 0.6(625π)
V_grain ≈ 1178.1 cubic yards (rounded to the nearest tenth)
Therefore, the volume of grain in the silo when it is 60% filled is approximately 1178.1 cubic yards.
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PLS BE FAST BEST ANSWER GETS BRAINLIEST
Answer:
12:20
How do you write a ratio?
In order to write a ratio lets put it in a simple form.
Let B, be the number of boys and G, be the number of girls.
So the ratio is the following:
B:G.
Since there are 12 boys and 20 girls you can put it in this simple ratio:
12:20.
Thus, 12:20 is your ratio.
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Lisa paid $44. 23 for 15. 1 gallons of gasoline. What was the cost per gallon, rounded to the nearest hundredth?
The cost per gallon of gasoline is given as follows:
$2.93.
How to obtain the cost per gallon?The cost per gallon of gasoline is obtained applying the proportions in the context of the problem.
The parameters for this problem are given as follows:
Total cost of $44.23.15.1 gallons of gasoline.Hence the cost per gallon of gasoline is given as follows:
44.25/15.1 = $2.93.
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Solve each equation by factoring. Check your answers. 16+22 x=3x² .
The equation 16 + 22x = 3x² by factoring, we set it equal to zero and factor it to obtain (3x - 4)(x + 4) = 0. Then, by setting each factor equal to zero and solving for x, we find x = 4/3 and x = -4.
To solve the equation 16 + 22x = 3x² by factoring, follow these steps:
Step 1: Rewrite the equation in standard form by subtracting 16 from both sides: 22x = 3x² - 16.
Step 2: Rearrange the equation in descending order: 3x² - 22x - 16 = 0.
Step 3: Factor the quadratic equation. To do this, find two numbers that multiply to give -48 (the product of the coefficient of x² and the constant term) and add up to -22 (the coefficient of x). The numbers -24 and 2 satisfy these conditions.
Step 4: Rewrite the middle term using these numbers: 3x² - 24x + 2x - 16 = 0.
Step 5: Group the terms and factor by grouping: (3x² - 24x) + (2x - 16) = 0.
3x(x - 8) + 2(x - 8) = 0.
(3x + 2)(x - 8) = 0.
Step 6: Set each factor equal to zero and solve for x:
3x + 2 = 0 --> 3x = -2
--> x = -2/3.
x - 8 = 0
--> x = 8.
Step 7: Check the solutions by substituting them back into the original equation.
For x = -2/3: 16 + 22(-2/3) = 3(-2/3)²
--> 16 - 44/3 = -4/3.
For x = 8: 16 + 22(8) = 3(8)²
--> 16 + 176 = 192.
Both solutions satisfy the original equation, so x = -2/3 and x = 8 are the correct answers.
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The only solution that satisfies the equation is x = 8.
To solve the equation 16 + 22x = 3x² by factoring, we need to rearrange the equation to set it equal to zero.
Step 1: Rewrite the equation in descending order of the exponents:
3x² - 22x + 16 = 0
Step 2: Factor the quadratic equation:
To factor the quadratic equation, we need to find two numbers that multiply to give the constant term (16) and add up to the coefficient of the middle term (-22).
The factors of 16 are: 1, 2, 4, 8, 16
We can try different combinations to find the factors that add up to -22. After trying, we find that -2 and -16 satisfy the condition: -2 + (-16) = -18.
Now we rewrite the middle term (-22x) using these factors:
3x² - 2x - 16x + 16 = 0
Step 3: Group the terms and factor by grouping:
(3x² - 2x) + (-16x + 16) = 0
x(3x - 2) - 8(2x - 2) = 0
Step 4: Factor out the common factors:
x(3x - 2) - 8(2x - 2) = 0
(x - 8)(3x - 2) = 0
Now we have two factors: (x - 8) and (3x - 2). To find the values of x, we set each factor equal to zero and solve for x.
Setting (x - 8) = 0, we get:
x - 8 = 0
x = 8
Setting (3x - 2) = 0, we get:
3x - 2 = 0
3x = 2
x = 2/3
So the solutions to the equation 16 + 22x = 3x² are x = 8 and x = 2/3.
To check our answers, we substitute these values back into the original equation and see if they satisfy the equation.
For x = 8:
16 + 22(8) = 3(8)²
16 + 176 = 192
192 = 192 (True)
For x = 2/3:
16 + 22(2/3) = 3(2/3)²
16 + 44/3 = 4/3
48/3 + 44/3 = 4/3
92/3 = 4/3 (False)
Therefore, the only solution that satisfies the equation is x = 8.
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Bob made 15,000 in taxable income lat year. Suppoe the income tax rate i 15% for the firt 8000 plu 19% for the amount over 8000. How much mut Bob pay in income tax for lat year?
Therefore, Bob must pay $2530 in income tax for last year if Bob made 15,000 in taxable income last year.
What is taxable income?The basis of an income tax system is referred to as taxable income. In other words, the amount of revenue that was subject to taxation.
Define revenue.Revenue is the entire amount of money made through the sale of products and services that are essential to the business's core activities.
The first $8000 of Bob's taxable income is taxed at 15%:
Tax on first $8000 = $8000 * 0.15 = $1200
The remaining $7000 of Bob's taxable income is taxed at 19%:
Tax on remaining income = $7000 * 0.19 = $1330
Total tax = $1200 + $1330 = $2530
So Bob must pay $2530 in income tax for last year.
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In the psychoanalytic tradition, projection of feelings onto members by the leader is called:
a) Transference
b) Thantos
c) Countertransference
d) Analysis
In the psychoanalytic tradition, the projection of feelings onto members by the leader is called: c) Countertransference.
Countertransference refers to the phenomenon where a therapist or leader projects their own emotions, experiences, or unresolved issues onto the individuals they are working with. It is a concept rooted in Sigmund Freud's psychoanalytic theory and is an important aspect of the therapeutic relationship.
When a leader experiences countertransference, they may unconsciously attribute their own thoughts, feelings, or motivations to the members of their group. This projection can distort the leader's perception of the group members and influence their interactions and decision-making processes. It can also hinder the leader's ability to provide objective and unbiased guidance or support.
Countertransference can arise due to various reasons, such as personal history, unresolved conflicts, or parallel experiences with the group members. It is essential for leaders to be aware of their countertransference reactions and work through them to maintain professional boundaries and provide effective leadership.
By recognizing and addressing countertransference, leaders can gain insight into their own emotional reactions and separate them from the experiences of their group members. This self-awareness enables leaders to approach their role with greater objectivity, empathy, and understanding.
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The negative sign can be read as "the opposite of."
True False
In the accompanying diagram, points A, E, and B are collinear, measure of angle A= 30, measure of angle DEB= 130, and segment AB is perpendicular to segment BC. Find the measure of angle C and the measure of angle D.
Step-by-step explanation:
I assume the points D, E and C are also collinear (are on the same straight line).
that is something your teacher forgot to mention. but it is essential.
we have to remember :
1. the sum of all angles in a triangle is always 180°.
2. the sum of all angles around a single point on one side of a line is also always 180°.
3. the angles at the intersection point of 2 lines are the same on both sides of any of the intersecting lines, but they are left-right mirrored.
so,
angle A = 30°
angle DEB = 130°, so,
angle AED = 180 - DEB = 180 - 130 = 50°.
therefore, angle BEC = AED = 50°
therefore, angle D = 180 - 30 - 50 = 100°.
we know, angle B = 90° (AB is perpendicular to BC).
therefore,
angle C = 180 - 90 - 50 = 40°
The cuboid below has a height of 42 mm
and a width of 8 mm. It has a volume of
3
5376 mm³.
What is the length of the cuboid?
Remember to give the correct units, and
give any decimal answers to 1 d.p
The length of the cuboid is 16 mm
In this question, we have been given a cuboid having height of 42 mm
and a width of 8 mm.
Also, the volume of the cuboid is 5376 mm³.
We know that, the volume of the cuboid is V = length × width × height
Here, width = 8 mm
height = 42 mm
V = 5376 mm³
We need to find the length of the cuboid.
V = length × width × height
5376 = length × 8 × 42
length = 5376 / 336
length = 16 mm
Therefore, the length of the cuboid is 16 mm
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On the main floor of the Kodak hall at Eastman theater the number of seats per row increases at a constant rate Steven counts 31 seats in row three and 37 seats in row six how many seats are there in route 20
Answer:
67
Step-by-step explanation:
no
of the 800 sweaters at a certain store, 150 are red. how many of the red sweaters at the store are made of pure wool?
The red sweaters at the store are made of pure wool = 50
What is Relation ship between store and sweater?
It is assumed that you reside in a region with harsh winters. We'll have to let our Vancouver pals use a little of their imagination.
The supply and demand for premium, warm winter sweaters is seen in the graph below.
When I first saw it in December, the sweater we desire costs 300. It's warm, lovely, and black, but costs more than like to spend. I am hoping for a price reduction before it gets too cold in January because the weather has been mild.
When January finally arrives, the weather is unusually pleasant. When I go back to the store, the sweater is now 25% discounted. That's 225, hmm. It's still pricey, and the weather isn't all that chilly. I wait in the hopes of getting a better deal.
Concept:
Of the 800 sweaters in a certain store, 150 are red. We can also infer from the stem that 650 are not red
a) 320 of the sweaters at the store are neither red nor made of pool wool. We can infer that 330 are wool but not red
b) 100 of the red sweaters at the store are not made of pure wool.
From this, we can infer that 50 are both red and wool
see the attachment for the solution of the table a & b
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I Put 100 Points Onto This Question.
The triangles are congruent by ide angle side property, and the reason for the equal angles is that alternate interior angles are congruent.
What are Congruent Triangles?A triangle is a closed polygon with three line segments that intersect at each of its three angles.
When the sides and angles of two triangles match, the triangles are said to be congruent. Consequently, it is possible to superimpose two triangles side by side and angle by angle.
Given CDEF is a perallelogram,
to prove ΔCDE ≅ ΔEFC
so CD ║ EF (from parallelogram)
since opposite sides of the parallelogram are parallel,
so EC and DF work as the transverse line,
here ∠DCE and ∠FEC are alternate interior angles,
and alternate interior angles are congruent with the parallel lines.
∠DCE = ∠FEC and ∠DEC = ∠FCE (alternate interior angles are congruent)
CE = CE (common side)
ΔCDE ≅ ΔEFC (SAS property)
Hence triangles are congruent and angles are equal because alternate interior angles are congruent.
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Hi can you please help me
The probability that student chosen at random is 16 years is 0.28.
How to find the probability of the student chosen?The table shows the distribution of student by age in a high school with 1500 students. Therefore, the probability that randomly chosen student is 16 years can be found as follows:
Therefore,
probability = number of favourable outcome to age / total number of possible outcome
Hence,
probability that student chosen at random is 16 years = 420 / 150
probability that student chosen at random is 16 years = 0.28
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Which mapping diagram represents a relationship that is a function?
Mapping A
Mapping B
3
7
O Mapping A
O Mapping B
O both Mapping A and Mapping B
Answer:
Mapping A
Step-by-step explanation:
The length of a rectangle i 2cm greater than the width of the rectangle. The perimeter of the rectangle i 24cm
The length of the rectangle is 7 cm and the width is 5 cm.
Perimeter of a rectangle:The whole distance covered by the rectangle's borders or its sides is known as its perimeter. As we know the rectangle will have 4 sides then the perimeter of the rectangle will be equal to the total of its four sides. And the unit will be in meters, centimeters, inches, feet, etc.
The formula for the Perimeter of the rectangle is given by
Perimeter = 2( Length + Width )Here we have
The length of a rectangle is 2cm greater than the width of the rectangle
And perimeter of the rectangle = 24 cm
Let x be the width of the rectangle
From the given data,
Length of the rectangle = (x + 2) cm
As we know Perimeter of rectangle = 2(Length+width)
=> Perimeter of rectangle = 2(x+2 + x) = 2(2x +2)
From the given data,
Perimeter of rectangle = 24cm
=> 2(2x +2) = 24 cm
=> (2x +2) = 12 [ Divided by 2 into both sides ]
=> 2x = 12 - 2
=> 2x = 10
=> x = 5 [ divided by 2 into both sides ]
Length of rectangle, (x+2) = 5 + 2 = 7 cm
Therefore,
The length of the rectangle is 7 cm and the width is 5 cm.
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A new zoo is coming to your city and they want to give away prizes. Every 4th customer will receive a panda hat, every 10th customer will receive a giraffe beach towel and every 20th customer will receive a stuffed gorilla. Out of the first 100 people to enter the zoo how many will get all three items?
Answer:
5 people
Step-by-step explanation:
Let's find LCM of 4, 10 and 20:
4 = 2*210 = 2*520 = 2*2*5LCM(4,10,20) =2*2*5 = 20
There are 100/20 = 5 twenties in 100
So every 20th person will get all 3 prizes, in total 5 people
Ray has tea. He has 2.671 liters of tea he pours 0.47 liters in a glass. how many liters did he pour? Solve.
On solving the given problem by help of mathematical operations, we got - After Ray poured 0.47L, he was left with 2.201L.
What does the term "mathematical operations" mean?The term "operation" in mathematics refers to the process of calculating a value using operands and a math operator. For the given operands or numbers, the math operator's symbol has predetermined rules that must be followed.
What are the five operations in mathematics?In mathematics, there are five basic operations: addition, subtraction, multiplication, division, and modular forms.
Total amount of tea Ray has - 2.671L
Amount of tea Ray poured - 0.47
Therefore,
amount he was left with was = 2.671- 0.47 = 2.201L
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