Answer:
Based on the solution that is being on Part A, the method used is substitution.
Explanation:
The two equations in Part A were:
x = the number of weeks
Equation 1: Lyle's savings = 100 + 20x
Equation 2: Shaun's savings = 500 + 10x
Since we wanted to know when Lyle's and Shaun's savings will be equal, we substituted "Lyle's savings" in the equation with 500 + 10x. It made equation 1 become 500 + 10x = 100 + 20x.
Or, we substituted "Shaun's savings" in the equation with 100 + 20x. It made equation 2 become 100 + 20x = 500 + 10x.
From this, we were able to calculate that at week 40, both Lyle and Shaun will have the same amount in their savings account.
\(\begin{gathered} 500+10x=100+20x \\ 500-100=20x-10x \\ 400=10x \\ \frac{400}{10}=\frac{10x}{10} \\ 40=x \end{gathered}\)What is the image point of (-2, -3) after a translation right 2 units and up 4 units?
Answer:
The Answer is (0, 1)
Step-by-step explanation:
add 2 and 4 to the x and y
Answer:
(0, 1)
Step-by-step explanation:
2 units right -> -2 + 2 = 0
4 units up -> -3 + 4 = 1
Help with all these? pls
1. 76.56.
2. 96
3. The largest solution to the equation x²+16x+28=138 is 6.71.
4. The smallest solution to the equation x²+14x+14=145 is 5.96.
What is an equation?Equations are used to express relationships between variables and solve mathematical problems.
1. This is calculated by taking the coefficient of x (19) and dividing it by two (19/2) and then squaring the result (19/2)² = 76.56.
2. This is calculated by taking the coefficient of x (30) and dividing it by two (30/2) and then squaring the result (30/2)² = 96.
3. This is calculated by using the quadratic formula, by taking the opposite of the coefficient of x (16) plus or minus the square root of the coefficient of x squared (16²) minus 4 times the coefficient of the x term (4x16) minus the constant (28) divided by 2 times the coefficient of the x term (2x16).
4. This is calculated by using the quadratic formula, by taking the opposite of the coefficient of x (14) plus or minus the square root of the coefficient of x squared (14²) minus 4 times the coefficient of the x term (4x14) minus the constant (14) divided by 2 times the coefficient of the x term (2x14).
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1. For the given equation, c need to be 90.25 to complete the square.
2. 225
3. The largest solution to the equation x²+16x+28=138 is 6.
4. The smallest solution to the equation x²+14x+14=145 is -14.
What is an equation?Equations are used to express relationships between variables and solve mathematical problems.
1. This is calculated by taking the coefficient of x (19) and dividing it by two (19/2) and then squaring the result
(19/2)² = 90.25.
2. This is calculated by taking the coefficient of x (30) and dividing it by two which is (30/2) and then squaring the result
(30/2)² = 225.
3. The largest solution to the equation x²+16x+28=138 is 6.
This can be calculated by using the quadratic formula to solve the equation.
(a=1, b=16, c=28)
x = -8 ± √((16)² - 4(1)(28))/2(1).
x = -8 ± √(240)/2
x = 6 or -14.
Since 6 is the larger solution, it is the largest solution to the equation.
4. The smallest solution for x2+14x+14=145 can be determined by using the Quadratic Formula.
a=1, b=14, and c=14
x = [-14 ± √(142-4(1)(14))]/(2(1))
x = [-14 ± √(196)]/2
x = [-28/2] or [14/2]
x = -14 or 7
Therefore, the smallest solution for x2+14x+14=145 is x=-14.
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The difference between a number and seven
Answer:
7-n
Step-by-step explanation: do you need an equation?
Translate and solve: Eighty-Two less than r is less than −164.
Give your answer in interval notation.
Answer:
(−∞,−82)
Step-by-step explanation:
Eighty-two less than r, r−82 is less than <−164.
Now we can solve the inequality by adding 82 to each side.
r−82r−82+82r<−164<−164+82<−82
In interval notation, we write this as (−∞,−82).
The value of r in the statement eighty-Two less than r is less than −164
is r < - 82.
What are inequalities and their types?Inequality is a relation that compares two numbers or other mathematical expressions in an unequal way.
The symbol a < b indicates that a is smaller than b.
When a > b is used, it indicates that a is bigger than b.
a is less than or equal to b when a notation like a ≤ b.
a is bigger or equal value of an is indicated by the notation a ≥ b.
The given statement is Eighty-Two less than r is less than −164 which can be numerically expressed as,
r - 82 < - 164.
r < - 82.
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Select an equivalent form of this equation: x/12 - 7 =x/4 x - 84 = 3 x x - 74 = 12 x x - 7 = 3 x
The "equivalent-form" of equation "x/12 - 7 = x/4" is "x - 84 = 3x", the correct option is (a).
In order to find the equivalent form of the equation "x/12 - 7 = x/4", we first need to solve for "x",
So, we first, simplify left side of equation by finding a common denominator for the two fractions:
⇒ x/12 - 7 = x/4,
⇒ x - 84 = 3x,
⇒ -84 = 2x,
⇒ x = -42,
Now, we check the given options by substituting the value of "x",
Option (a) : x - 84 = 3x,
Substituting x = -42,
We get,
⇒ -42 - 84 = 3(-42),
⇒ -126 = -126
This equation is true, so option (a) is an equivalent form of the original equation.
Option (b) : x - 74 = 12x,
Substituting x = -42,
We get,
⇒ -42 - 74 = 12(-42),
⇒ -116 = -504,
This equation is not true, so option (b) is not an equivalent form of the original equation.
Option (c) : x - 7 = 3x,
Substituting x = -42,
We get,
⇒ -42 - 7 = 3(-42),
⇒ -49 = -126,
This equation is not true, so option (c) is not an equivalent form of the original equation.
Therefore, the correct option is (a) .
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The given question is incomplete, the complete question is
Select an equivalent form of this equation: x/12 - 7 =x/4
(a) x - 84 = 3x
(b) x - 74 = 12x
(c) x - 7 = 3x
6. Choose the correct answer.
James bought an antique chair. Its value can be modeled with the function A(t) = 1,050(1.12). Which statement is true about this situation?
A. its value will increase by 1.12%.
B. its value will decrease by 1.12%.
C. Its value will decrease by 12%.
D. its value will increase by 12%.
If g(x) = 5x + 3 and (gof)(x) = 2x + 5 and f(x) is a linear function, find the value of f(x).
\((g\circ f)(x)=2x+5=5f(x)+3\\2x+5=5f(x)+3\\5f(x)=2x+2\\f(x)=\dfrac{2}{5}x+\dfrac{2}{5}\)
The volume of a cone is 13.4m cubed and the radius is 3.2m what is the height
Answer:
The height is 1.25m.
Step-by-step explanation:
Volume = 1/3 πr²h
Given:
V = 13.4 m³
r = 3.2 m
Asked: height (h)
Substitute the formula with the given values then solve
13.4m³ = 1/3π(3.2m)²h
13.4(3) = 10.24πh
40.2 = 10.24πh
h = 40.2/10.24π
h = 1.25m
The height of the cone is 1.25 meters.
We know that the volume of the cone is given by
V = (1 / 3) * π * r ^2 * h................equation 1
where,
V is the volume of the cone.
r is the radius of the cone's base
h is the height
The volume and radius of the cone are given,
V = 13.4 m
r = 3.2m
substituting these values in equation 1 we get,
13.4 = (1 / 3) * 3.14 * 3.2 ^ 2 * h
on simplifying further
13.4 = 10.717 * h
h = 1.25m
The height of the cone is 1.25 meters.
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Which of the following are valid names for the given triangle? Check all that
apply.
Answer:
B, E and F hope this is correct
A point is randomly selected from the interior of the square pictured here: A square has its four vertices marked as A, B, C, and D. Side AD is labeled 1 foot length. Let denote the distance from the lower left-hand corner to the selected point. What are possible values of
Question:
A point is randomly selected from the interior of the square pictured here: A square has its four vertices marked as A, B, C, and D. Side AD is labeled 1 foot length. Let x denote the distance from the lower left-hand corner to the selected point. What are values of x?
Answer:
x = (0 to √2)
Step-by-step explanation:
Given:
Sides of a square labeled A, B, C, D
AD = 1 foot
Let x = distance from the lower left-hand corner to the point selected.
Since, it is a square, all sides are equal.
AB = 1 ft, BC = 1ft, CD = 1ft, AD = 1 ft
Since x is the distance from the lower left-hand corner to the selected point, here the lower left hand corner is point C.
Find the possible values of x.
C² = 1² + 1²
C² = 1 + 1
C² = 2
Take square root of both sides
√C² = √2
C = √2
Therefore, the possible values of x ranges from 0 to √2
X can be said to be continuous
hi, can you answer this?
can you give me some advice? i want to end me but idk what day.. does mother's day sound good or sooner?
dont , i know its hard but hang on :)
you can do it when pigs fly ( pigs will never be able to fly therefore youll never be able to leave )
you got this ok? if you need someone to vent to im right here !
mrs. watson is buying vintage records for a friend at a local records shop. Thre price of a record is based on its condition. The table shows the total cost of x number of records for each condition.
The equation for total cost of buying and shipping the records is
76.4x + 80
We have,
She buys 3 in good condition
So, the cost for 3 good condition
= 3 (10.5x)
= 31.5 x
and, She buys 1 in Fair condition
So, the for 1 fair condition
= 5x
and, She buy 2 new condition then the price is
= 39.9 x
So, the equation for total cost of buying and shipping the records is
= 31.5x + 5x + 39.9x + 8
= 76.4x + 8
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The first one is False and the second one is True, just took the test.
A straight line on a coordinate plane always represents a function. FALSE
The equation y = 2x + 1 represents a function. TRUE
False statement: A straight line on a coordinate plane always represents a function.
True statement: The equation y = 2x + 1 represents a function.
What is a function?A function is a relationship between a number of inputs and outputs. A function is an association of inputs where each input is coupled with exactly one output. There is a range, co-domain, and domain for every function.
A vertical line,
x=c,
represents a one-to-many mapping,
which is only a relation, not a function.
Explanation:
If all vertical lines crossed it no less than once, it would constitute a function.
Another name for this is the vertical line test.
If a graph only has one output (y) for each input (x), it will be regarded as a function.
A vertical line is thus not a function.
So, the first statement is false.
Now, we have,
y = 2x + 1
From the attached images,
we can clearly say that the y = 2x + 1 is a function.
The graph only has one output (y) for each input (x), it will be regarded as a function.
So, the second statement is true.
Therefore, the first statement is false, and the second statement is true.
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Evaluate if a = 6, b = 2, c = 9, & d = 3
Answer:
12
Step-by-step explanation:
a2 b
( )2 ( )
(–2)2 (3)
(4)(3)
Part a: A deli receives a large order for sandwiches for a company picnic. The company wants one club sandwich and two regular sandwiches for each person. The company also wants an extra Dagwood sandwich. A club sandwich has $3$ slices of bread. A regular sandwich has $2$ slices. A Dagwood has $5$ slices. If there are $n$ people going to the company picnic, how many slices of bread does the deli need to make this order? Write your answer as a fully simplified expression. Your answer should have the variable $n$ in it exactly once. Part b: Given that the deli ends up using $110$ slices of bread, how many people are going to the company picnic?
Answer:
Um...
I know the answer to Part A, but not to Part B.
Step-by-step explanation:
The answer for Part A is 7n + 5. Hope this helps!
In each of the following graphs, find the lengths of the line segments shown. Write your answers (in simplest
radical form if they are not integers.
(a)
B
(b)
Q
The length of the two segments, written as radicals, are:
AB = √117
PQ = √244
How to find the length of the segments shown?Remember that for a segment whose endpoints are (x₁, y₁) and (x₂, y₂), the length of the segment is:
L = √( (x₂ - x₁)² + (y₂ - y₁)²)
First, for the segment AB the endpoints are:
A = (-4, -4)
B = (2, 5)
Then the length is:
L = √( (-4 - 2)² + (-4 - 5)²)
L = √117
For the segment PQ the endpoints are:
P = (-6, 8)
Q = (6, -2)
The length is:
L = √( (-6 - 6)² + (8 + 2)²)
L = √244
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Write the equation of the line in fully simplified slope-intercept form.
The equation of the line in slope intercept form is y = 1 / 5 x + 7.
How to represent equation in slope intercept form?The equation of a line can be represented in slope intercept form as follows:
y = mx + b
where
m = slope of the lineb = y-interceptTherefore, let's find the slope of the line as follows:
using (0, 7) and (5, 8)
m = 8 - 7 / 5 - 0
m = 1 / 5
m = 1 / 5
Therefore, let's find the y-intercept using (0, 7).
Hence,
y = 1 / 5 x + b
7 = 1 / 5 (0) + b
b = 7
Therefore, the equation of the line is y = 1 / 5 x + 7
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T is the reflection of t across the line x=6 if the coordinates t are(-3,7) what are the coordinates of t
Therefore , the solution of the given problem of coordinates comes out to be , T's values are (15, 7).
Describe coordinate.
A coordinate system can be used to precisely find points or additional mathematical objects on such a space, including Euclidean space, by using one or more variables or coordinates. To find a point or item on a double plane, one uses coordinates, which are pairs of numbers. Two numbers called the y and x matrices are used to describe a point's location on a two-dimensional plane. a set of numbers used to identify specific locations. The number usually consists of two digits.
Here,
In other terms, the x-coordinate of T is 6 times the difference between t and 6, or:
=> T's x-coordinate is 6 plus (6 minus (-3)) = 15
We can use the fact that the line of reflection is just the perpendicular bisector of the section joining t and to determine the y-coordinate of T. T's separation from the line
=> x=6 is 6 - (-3) = 9,
which is also T's separation from the line x=6.
The y-coordinate of T is the same as the y-coordinate of t because the line of reflection is the perpendicular bisector of the section joining t and T, which is:
=>T has a y-coordinate of 7.
Consequently, T's values are (15, 7).
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What is the fraction: 9/8 to the 2nd power?
Answer:
9/8 x 9/8 = 81/64 in fraction form.
Hi there!
»»————- ★ ————-««
I believe your answer is:
\(\frac{81}{64}\)
»»————- ★ ————-««
Here’s why:
⸻⸻⸻⸻
\(\boxed{\text{Calculating the answer...}}\\\\(\frac{9}{8})^2\\\\\text{Recall the power of a fraction rule: } (\frac{a}{b})^x =\frac{a^x}{b^x}\\\\\rightarrow (\frac{9}{8})^2 =\frac{9^2}{8^2} =\boxed{\frac{81}{64}}\)
⸻⸻⸻⸻
»»————- ★ ————-««
Hope this helps you. I apologize if it’s incorrect.
What's the inverse of ƒ(x) = x – 20?
Therefore , the solution of Inverse function comes out to be of x-20 equals to x+20
What is the inverse symbol?A function f has an inverse function only if for every y in its range there is only one value of x in its domain for which f(x)=y. This inverse function is unique and is frequently denoted by f−1 and called “f inverse.” For an overview into the idea of an inverse function, see the function machine inverse.Steps for finding the inverse of a function fReplace f(x) by y in the equation describing the function. Interchange x and y. In other words, replace every x by a y and vice versa.
Here,
Solve for y.
Replace y by f-1(x).
y=x-20
x=y-20
Solve for y,x = y-20
x+20
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Answer:
ƒ^(-1)(x) = x + 20
Step-by-step explanation:
To find the inverse of the function ƒ(x) = x - 20, we need to switch the roles of x and y and solve for y.
Let's start by replacing ƒ(x) with y:
y = x - 20
Next, swap x and y:
x = y - 20
Now, solve for y by isolating it:
x + 20 = y
Therefore, the inverse of the function ƒ(x) = x - 20 is given by:
ƒ^(-1)(x) = x + 20
Question... factor 28+4x
Answer:
4(7 + x)
Step-by-step explanation:
28 + 4x
4 ⋅ 7 + 4x
4(7 + x)
good luck hope this helps :)
Find the greatest common factor for the terms involved in the polynomial.
In this case, the greatest common factor between 28 and 4 is 4.
So a 4 factors out of this polynomial.
That leaves us with each term divided by 4
inside a set of parentheses.
So we have 4(7 + x).
Now you can check your answer by distributing the 4 through
the parentheses and you will end up with your original polynomial.
(NEED HELP WILL GIVE BRAINLIEST AND 5 STARS FOR A FAST ANSWER I HAVE 30 MINUTES)
If there is a quadratic function that has roots at x=1 and x=2, write a possible equation of this function? If there can be more than one possible equation, provide another equation for this function. If there cannot be more than one equation, explain why not.
The equation of the function that has roots at x=1 and x=2 are f(x) = (x-1)(x-2) and f(x) = 2(x-1)(x-2)
Writing the equation of the functionIf a quadratic function has roots at x=1 and x=2, this means that the function has factors of (x-1) and (x-2).
To find a possible equation of the function, we can start with the factored form:
f(x) = a(x-1)(x-2)
where "a" is a constant that scales the function.
We can find the value of "a" by using a third point on the graph of the function.
So, the possible equations are
f(x) = (x-1)(x-2) and f(x) = 2(x-1)(x-2)
Note that there are other possible equations too
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40 is what percent of 320
Which of the scatter plots below shows the most accurate line of best fit?
PLS LOOK AT PICTURE AND HELP ME, IM BEING TIMED
Answer:
Z
Step-by-step explanation:
Find value of x in trapezoid
Answer:
x = 1
Step-by-step explanation:
You want to know the value of x in the trapezoid with adjacent angles (43x+2)° and 135°.
Supplementary anglesThe two marked angles can be considered "consecutive interior angles" where a transversal crosses parallel lines. As such, they are supplementary.
(43x +2)° +135° = 180°
43x = 43 . . . . . . . . . . . . . . divide by °, subtract 137
x = 1 . . . . . . . . . . . . . . . divide by 43
The value of x is 1.
__
Additional comment
Given that the figure is a trapezoid, we have to assume that the top and bottom horizontal lines are the parallel bases.
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Find the missing angle using trigonometry
Answer:
please look at detailed answers below
Step-by-step explanation:
example 1 is correct.
example 2:
x = (12 sin 15) / sin 75 = 3.22.
example 3:
x/sin 90 = 19/sin (180 - 90 -36)
x = (19 sin 90) / sin 54
= 23.5
example 4:
x/sin 53 = 7/sin (180 -90 - 53)
x = (7 sin 53)/ sin
= 9.29
Which of the following graphs could represent a quartic function?
A.
B.
D.
A. Graph A
Ο Ο Ο
B. Graph B
C. Graph C
D. Graph D
Answer:
D
Step-by-step explanation:
a quartic function is a polynomial of the 4th degree. that means that in the function expression the highest exponent of a term of x is 4.
y = ax⁴ + bx³ + cx² + dx + e
with a not 0.
the degree of a polynomial expression defines also how many zeroes (x values that create y = 0, that means points where the graph intersects the x-axis) there are.
a function has as many zeroes as the degree of the polynomial.
so, we are looking for potentially 4 zeroes.
the only graph that fulfills that is D.
the left "touch" of the graph on the x-axis counts for 2 (but equal) zeroes.
you can always test by virtually shifting the graph up or down and see, what are the max. x-axis intersections you can create.
if shifting D down a little bit you see, that this left "touch" turns into 2 intersections.
the same would apply for a "bend" or turn in the graph that does not even touch the x-axis.
if the original graph has not enough real x-axis intersections, it means that the remaining zeroes are then "imaginary" complex numbers (based on the sqrt(-1) = i).
a polynomial of the nth degree, must have n zeroes.
as a consequence it must have n-1 turns (even if the corresponding curve segments don't intersect with the x-axis in the real number space).
Answer:graph d
Step-by-step explanation:
just took the test
Jane shares 5 pounds of kibble equally in 4 dog bowls. How many pounds of kibble are in each bowl?a.one and four fifthsb.one and two fourthc.four fifthsd.one fourth
The amount of kibble in each bowl = 1 1/4 pounds
The correct answer is an option (d)
Let us assume that m represents the amount of kibble and n represents the number of dog bowls.
Jane shares 5 pounds of kibble equally in 4 dog bowls.
This means that m = 5 and n = 4
Let r represents the amount of kibble in each bowl.
To find the pounds of kibble in each bowl we divide the value of m by n.
i.e., r = m/n
r = 5/4
We write above fraction as an improper fraction.
r = 1 1/4
Therefore, the amount of kibble in each bowl = one and one fourth
The correct answer is an option (d)
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The complete question is:
Jane shares 5 pounds of kibble equally in 4 dog bowls. How many pounds of kibble are in each bowl?
a.one and four fifths
b.one and two fourth
c.four fifths
d.one and one fourth
A drone rises 18 m every three seconds. After five seconds, the drone is at a height of 40 m how many meters is a drone rise each second
The height rises by the drone each second is 6 meters.
What is an expression?The mathematical expression combines numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.
Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also denote the logical syntax's operation order and other properties.
Given that a drone rises 18 m every three seconds. After five seconds, the drone is at a height of 40 m.
The height will be calculated as:-
3 sec = 18 meters
1 sec = 18 / 3 meters
1 sec = 6 meters
Hence, the height in 1 second will be 3 meters.
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Homany zeros are in the product (6×5)×10^3