pls help help help help help​

Answer:

It is only a solution to y = x - 2, not -3x - 2y = -8

Step-by-step explanation:

I) Check y = x - 2:

y = x - 2

2 = 4 - 2

As you can see, (4, 2) is a solution to this system.

II) Check -3x - 2y = -8:

-3x - 2y = -8

(-3)(4) - (2)(2) = -8

-12 - 4 =/= 8

-12 - 4 = -16, not 8. So (4, 2) is not a solution to this system.

The roots of the quadratic function f(x) = -3x² - 11x - 5 will be negative 3.14 and negative 0.53.

Let the equation be ax² + bx + c = 0.

Then the roots of the equation will be

\(\rm x = \dfrac{-b \pm \sqrt{b^2 - 4 a c }}{2a}\)

The quadratic function is given below.

f(x) = -3x² - 11x - 5

Then the roots of the quadratic function will be given as,

x = [-(-11) ± √{(-11)² - 4 × (-3) × (-5)}] / [2 × (-3)]

Simplify the equation, then the roots of the equation are calculated as,

x = [-(-11) ± √{(-11)² - 4 × (-3) × (-5)}] / [2 × (-3)]

x = [ 11 ± √{121 - 60}] / [-6]

x = - (11 ± 7.81) / 6

x = - (11 + 7.81) / 6, - (11 - 7.81) / 6

x = - 3.14, -0.53

The solution of the quadratic function will be negative 3.14 and negative 0.53.

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Answer:

25

Step-by-step explanation:

5x5 = 25

Answer:

25

Step-by-step explanation:

Let's go through our times tables really quick!

5x1 = 5 (5 + 0)

5x2 = 10 (5 + 5)

5x3 = 15 (5 + 5 + 5 [10 + 5])

5x4 = 20 (5 + 5 + 5 + 5 [15 (5x3) + 5)

As we can see, if we know 5x4, we can easily find 5x5! It's just 5x4 + 5

So, 5x5 is 25

Hope this helped!

The baker would need 47. 25 cups of floor

We need to know that proportion is a form of mathematical comparison with two equations made equal to each other.

From the information given, we have that;

baker used 33 3/4 cups of flour to make 15 batches of cookies

This is represented as;

Convert to improper fractions

135/4 cups = 15 batches of cookies

Then, x cups = 21 batches of cookies

cross multiply the values

15x = 708. 75

Divide both sides by the coefficient of x, we have ;

x = 708. 75/15

x = 47. 25 cups of floor

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Answer: Ans is 990. First such a number is 5×0 +2=2, then 5×1 +2=7, like that in all 20 numbers are there from 2 to 97 in A.P.with common difference of 5.

Step-by-step explanation:

Answer:

A. The model under-predicts the price of this diamond because the residual is positive.

Step-by-step explanation:

The diamond seller has listed its 0.8 weighting diamonds at a price of $10,999. The price of the diamond is set as the market maker. The model is used to predict the price of the diamonds. This model has under predicted the value of diamonds and actual price of diamonds must be higher.

Using the given zero . The three zeros of the polynomial function are 1 + i, 1 - i, 1/2, and 2.

If 1 + i is a zero of the polynomial function P(x), then its conjugate, 1 - i, must also be a zero of the polynomial, since complex zeros of polynomial functions with real coefficients always come in conjugate pairs.

To find the remaining zero, we can use polynomial division or synthetic division to divide P(x) by (x - 1 - i)(x - 1 + i), which is the quadratic factor corresponding to the two known zeros:

      2x^2 - 3x + 2

P(x) = --------------

       (x - 1 - i)(x - 1 + i)

Now we need to solve for the roots of the quadratic factor 2x^2 - 3x + 2. We can use the quadratic formula:

x = [3 ± sqrt(9 - 4*2*2)] / (2*2)

 = [3 ± sqrt(1)] / 4

 = 1/2 or 2

Therefore, the remaining zeros of P(x) are 1/2 and 2. The three zeros of the polynomial function are 1 + i, 1 - i, 1/2, and 2.

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Here are the correct matches to the expressions to their solutions.

The GCF of 28 and 60 is 4.

(-3/8)+(-5/8) = -4/4 = -1.

-1/6 DIVIDED BY 1/2 = -1/6 X 2 = -1/3.

The solution of 0.5 x = -1 is x = -2.

The solution of 1/2 m = 0 is m = 0.

-4 + 5/3 = -11/3.

-2 1/3 - 4 2/3 = -10/3.

4 is not a solution of -4 < x.

1. The GCF of 28 and 60 is 4.

The greatest common factor (GCF) of two numbers is the largest number that is a factor of both numbers. To find the GCF of 28 and 60, we can factor each number completely:

28 = 2 x 2 x 7

60 = 2 x 2 x 3 x 5

The factors that are common to both numbers are 2 and 2. The GCF of 28 and 60 is 2 x 2 = 4.

2. (-3/8)+(-5/8) = -1.

To add two fractions, we need to have a common denominator. The common denominator of 8/8 and 5/8 is 8. So, (-3/8)+(-5/8) = (-3 + (-5))/8 = -8/8 = -1.

3. -1/6 DIVIDED BY 1/2 = -1/3.

To divide by a fraction, we can multiply by the reciprocal of the fraction. The reciprocal of 1/2 is 2/1. So, -1/6 DIVIDED BY 1/2 = -1/6 x 2/1 = -2/6 = -1/3.

4. The solution of 0.5 x = -1 is x = -2.

To solve an equation, we can isolate the variable on one side of the equation and then solve for the variable. In this case, we can isolate x by dividing both sides of the equation by 0.5. This gives us x = -1 / 0.5 = -2.

5. The solution of 1 m = 0 is m = 0.

To solve an equation, we can isolate the variable on one side of the equation and then solve for the variable. In this case, we can isolate m by dividing both sides of the equation by 1. This gives us m = 0 / 1 = 0.

6. -4 + 5/3 = -11/3.

To add a fraction and a whole number, we can convert the whole number to a fraction with the same denominator as the fraction. In this case, we can convert -4 to -4/3. So, -4 + 5/3 = -4/3 + 5/3 = -11/3.

7. -2 1/3 - 4 2/3 = -10/3.

To subtract two fractions, we need to have a common denominator. The common denominator of 1/3 and 2/3 is 3. So, -2 1/3 - 4 2/3 = (-2 + (-4))/3 = -6/3 = -10/3.

8. 4 is not a solution of -4 < x.

The inequality -4 < x means that x must be greater than -4. The number 4 is not greater than -4, so it is not a solution of the inequality.

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Answer:B 25%

Step-by-step explanation:

6 people had 6-8 and there are 24 total people so the fraction is 6/24 which is equivalant to 1/4 which equals 25%

Answer:

25%

Step-by-step explanation:

add up all you get 24

add absences between 6 and 8 you get 6

6/24= 25

The value of the underlined digit in the number 27,416,385.( 4 is the underlined number.) is the hundred thousandths place.

The symbols, from 0 to 9 can be described as a digit. For instance, the numbers 2 and 3 are used to represent the number 23.  however amount is represented by a number.

It should be noted that It may be expressed using one, two, three, or even more digits however only single symbol used to represent a number is a digit in the case above we can see that 4 is the hundred thousandths place.

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Answer:

s

Step-by-step explanation:

Emily used an area model for 5,360 ÷ 5 split a rectangle into four parts: A=1,000, B=60, C=10, and D=2 units and total area = 5,360 after division the answer is 1,072.

To solve the division equation 5,360 ÷ 5, Emily used an area model split into 4 parts, each with a width of 5 units. Let's use the information provided to find the values of A, B, C, and D.

The area of the first part is 5,000 square units, and its width is 5 units. Therefore, the height of this part (A) is:

A = Area / Width

A = 5,000 / 5

A = 1,000 units

The area of the second part is 300 square units, and its width is 5 units. Therefore, the height of this part (B) is:

B = Area / Width

B = 300 / 5

B = 60 units

The area of the third part is 50 square units, and its width is 5 units. Therefore, the height of this part (C) is:

C = Area / Width

C = 50 / 5

C = 10 units

The area of the fourth part is 10 square units, and its width is 5 units. Therefore, the height of this part (D) is:

D = Area / Width

D = 10 / 5

D = 2 units

Now, we have the following values:

A = 1,000 units

B = 60 units

C = 10 units

D = 2 units

To find the total area of the rectangle, we sum up the areas of all four parts:

Total Area = 5,000 + 300 + 50 + 10 = 5,360 square units

Now, we can calculate the division 5,360 ÷ 5:

5,360 ÷ 5 = 1,072

Therefore, using area model the answer to the division equation is 1,072.

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The decision of which two homework assignments to complete depends on Mofor's individual circumstances and priorities.

If Mofor only has time to do two homework assignments out of the five subjects, he will need to choose which subjects to prioritize. The specific subjects he chooses to work on will depend on various factors such as his strengths, weaknesses, upcoming deadlines, and personal preferences. Here are a few strategies he could consider:

1. Prioritize based on importance: Mofor can prioritize the homework assignments that carry more weight in terms of grades or have upcoming deadlines. This way, he ensures that he completes the assignments that have a higher impact on his overall academic performance.

2. Focus on challenging subjects: If Mofor finds certain subjects more difficult or time-consuming, he can prioritize those assignments to allocate more time and effort to them. This approach allows him to concentrate on improving his understanding and performance in subjects that require extra attention.

3. Balance workload: Mofor can choose to distribute his efforts evenly across subjects, selecting two assignments from different subjects. This strategy ensures that he maintains a balanced workload and avoids neglecting any particular subject.

The decision of which two homework assignments to complete depends on Mofor's individual circumstances and priorities. It is essential for him to consider his academic goals, time constraints, and personal strengths to make an informed decision.

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Answer:

1st= 47/7 or 6.71

2nd= 48/7 or 6.857

Step-by-step explanation:

1st number =X and 2nd number = Y

According to question, X+7=2Y

20+Y=4X

X=2Y-7 (from 1st condition)

putting in it second

20+Y=4(2Y-7)

20+Y=8Y-28

20+28=8Y-Y

48=7Y

Y=48/7

so X=2(48/7)-7

=96-49/7

47/7

Answer:

q = 4p - 5t / 2x^2

Step-by-step explanation:

2qx^2 + 5t = 4p

2qx^2 = 4p - 5t

q = 4p - 5t / 2x^2

let's firstly convert the mixed fractions to improper fractions and then proceed.

\(\stackrel{mixed}{3\frac{1}{9}}\implies \cfrac{3\cdot 9+1}{9}\implies \stackrel{improper}{\cfrac{28}{9}} ~\hfill \stackrel{mixed}{8\frac{1}{3}}\implies \cfrac{8\cdot 3+1}{3}\implies \stackrel{improper}{\cfrac{25}{3}} \\\\[-0.35em] ~\dotfill\)

\(-\cfrac{28}{9}~~ - ~~\left( -\cfrac{25}{3} \right)\implies -\cfrac{28}{9}~~ + ~~\left( \cfrac{25}{3} \right)\implies -\cfrac{28}{9} + \cfrac{25}{3} \\\\\\ \stackrel{\textit{using the LCD of 9}}{\cfrac{1(-28)~~ + ~~3(25)}{9}}\implies \cfrac{-28+75}{9}\implies \cfrac{-47}{9}\implies {\LARGE \begin{array}{llll} -5\frac{2}{9} \end{array}}\)

Answer:

Simplifying the expression `n + n - 0.18n`, we get:

n + n - 0.18n = 2n - 0.18n

Therefore, the expression `n + n - 0.18n` is equivalent to `2n - 0.18n`.

Looking at the answer choices:

a. 1.18n

b. 1.82n

c. n- 0.18

d. 2n - 0.82

We can see that choice d is equivalent to the simplified expression `2n - 0.18n`.

Therefore, the answer is d. 2n - 0.82.

Step-by-step explanation:

Answer: 4 i think

Step-by-step explanation:

65=15y+5

65 - 5 = 15y +5 -5

60 = 15y

60/15 = 15y/15

4 = y

Data Set 1:

Mean: 8.14

Median: 9

Mode: No mode

Range: 9

IQR: 5.5

Data Set 2:

Mean: 7.71

Median: 8

Mode: No mode

Range: 11

IQR: 7

Here are two data sets with 7 numbers each:

Data Set 1: 3, 5, 7, 9, 10, 11, 12

Data Set 2: 2, 4, 6, 8, 10, 11, 13

To create a double dot plot, we will represent each data set using a line with dots above the corresponding values. Here is a visual representation:

Data Set 1:    Data Set 2:

   3              2

   5              4

   7              6

   9              8

  10             10

  11             11

  12             13

Now let's calculate the mean, median, mode, range, and interquartile range (IQR) for each data set.

Data Set 1:

Mean: (3 + 5 + 7 + 9 + 10 + 11 + 12) / 7 = 57 / 7 ≈ 8.14

Median: 9

Mode: No mode (no repeated values)

Range: 12 - 3 = 9

IQR (Interquartile Range): The first quartile (Q1) is the median of the lower half of the data, and the third quartile (Q3) is the median of the upper half of the data. The IQR represents the variation between Q3 and Q1. In this case, the IQR is the difference between the medians of the two halves.

Q1: (5 + 7) / 2 = 6

Q3: (11 + 12) / 2 = 11.5

IQR: 11.5 - 6 = 5.5

Data Set 2:

Mean: (2 + 4 + 6 + 8 + 10 + 11 + 13) / 7 = 54 / 7 ≈ 7.71

Median: 8

Mode: No mode (no repeated values)

Range: 13 - 2 = 11

IQR: The median of the lower half of the data is represented by the first quartile (Q1), while the median of the higher half is represented by the third quartile (Q3). The IQR represents the variation between Q3 and Q1. In this case, the IQR is the difference between the medians of the two halves.

Q1: (4 + 6) / 2 = 5

Q3: (11 + 13) / 2 = 12

IQR: 12 - 5 = 7

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Answer:

34 and 1/3

Step-by-step explanation:

Hey there!

The answer is \(\frac{1}{6}\)

To make \(\frac{1}{2}\) of a recipe is like dividing by 2, so \(\frac{4}{12}\) divided by 2 is \(\frac{2}{12}\), or \(\frac{1}{6}\).

Hope it helps and have a good day/night!

Answer:

$350

Step-by-step explanation:

If $280 is the 20% savings from the original price, it is 80% of original price.

280 / 0.8 = 350

From this equation, we can know that 350 is 100% of original price, which makes it the original price.

Hope this helps!

The original price of laptop is $1400.

A branch of mathematics known as algebra deals with symbols and the mathematical operations performed on them.

Variables are the name given to these symbols because they lack set values.

In order to determine the values, these symbols are also subjected to various addition, subtraction, multiplication, and division arithmetic operations.

Given:

Saving on laptop = $280.

let the original price be x.

So, 20% of x = 280

20x /100= 280

x/5 = 280

x= 1400

Hence, the original price of laptop is $1400.

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Answer:

the solution is -1 as the answer

perdon ese fue mi error jaja señorita lee algunos números

If g(t) is cut in half, then t is doubled. Halving the growth factor halves the rate of growth, reducing the time required for a generation to develop to full size.

Growth factor refers to a mathematical expression or a metric that measures the rate of increase or growth of a quantity over time. It is used in many fields such as biology, economics, finance, and others to quantify the increase in size, population, revenue, or any other variable of interest. The growth factor can be represented as a ratio, percentage, or an exponential function and is used to predict future growth based on past trends.

3 potential points

Three tries are permitted.

If g(t) is divided in half, t is also divided in half. This is because the growth factor is a measure of the rate of growth, and halving it equals halves the rate of growth. As a result, the time required for a generation to develop to full size is cut in half.

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Answer:

\(\dfrac{(a+2\sqrt{b})^2 }{a^2-4b}\)

Step-by-step explanation:

To rationalise the denominator, multiply by the expression by \(\dfrac{a+\sqrt{4b} }{a+\sqrt{4b} }\):

\(=\dfrac{a+\sqrt{4b} }{a-\sqrt{4b} }\times\dfrac{a+\sqrt{4b} }{a+\sqrt{4b} }\)

\(=\dfrac{(a+\sqrt{4b}) (a+\sqrt{4b})}{(a-\sqrt{4b}) (a+\sqrt{4b})}\)

\(=\dfrac{(a+\sqrt{4b})^2 }{a^2-4b}\)

\(=\dfrac{(a+2\sqrt{b})^2 }{a^2-4b}\)

\(\\ \rm\hookrightarrow \dfrac{a+\sqrt{4b}}{a-\sqrt{4b}}\)

\(\\ \rm\hookrightarrow \dfrac{a+x}{a-x}\)

\(\\ \rm\hookrightarrow \dfrac{(a+x)^2}{a^2-x^2}\)

\(\\ \rm\hookrightarrow \dfrac{a^2+2ax+x^2}{a^2-x^2}\)

\(\\ \rm\hookrightarrow \dfrac{a^2+2a\sqrt{4b}+4b}{a^2-4b}\)

The elements using rooster-method:

A){3,4,5,6,7,8,9,10}

B){5,6,7,8,9,10,11,12,13,14}

What is rooster-method?

By listing the items of a set inside brackets, the roster method may be used to display the elements of a set. One of three ways to describe a set is in rooster form. The items of a set are listed in the roster form between curly or following brackets, with commas separating each element. When items repeat in the set, the roster approach actually has an issue. Because the elements do not follow a pattern or have a specific order, it is impossible to describe the elements in roster notation if the set has a significant number of elements or any repeated elements.

A)Set of natural odd numbers greater than 2 but less than 11:

Let us represent the set using symbol O:

O = {3,4,5,6,7,8,9,10}

B){x| x∈ N and 4<x<15}

Given that x is a natural number greater than 4 but less than 15.

X={5,6,7,8,9,10,11,12,13,14}

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Answer:

\(\huge\boxed{\sf x = 9}\)

Step-by-step explanation:

3(x + 4) - 11 = 28

3(x + 4) = 28 + 11

3(x + 4) = 39

3x + 12 = 39

3x = 39 - 12

3x = 27

x = 27/3

\(\rule[225]{225}{2}\)

Answer:

momdhwdjwbdjwbdjwbdjwbdjwbd a amamamamamamama

Step-by-step explanation:

Answer:

10.44

Step-by-step explanation:

First plot each of the points on to a graph at their respective positions.

Following that create a 90° triangle out of the points. This will create a 3 by 10 triangle. (3 to 0 is 3) (-8 to 2 is a difference of 10)

You can then use the pythagorean theorem \(a^{2} +b^{2} = c^{2}\).

Insert the lengths of each of the sides that we got earlier which would be 3 and 10 into the equation. \(3^{2} + 10^{2} = c^{2}\)

Since we want to find the hypotenuse which is equal to c we work the equation to 9+100 = \(c^{2}\) which in turn is 109 = \(c^{2}\)

Then take the square root of 109 to remove the square from the c to get c = 10.44