HELP ME PLZZZZZZ IM BEGGING YOU

Answers

Answer 1

Answer: You need to multiply that 3 with what is in the parenthesis.

3(7 - x) + 6x
21 - 3x + 6x

now combine the like terms

21 + 3x

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See images for the following problem

Answers

I can’t see it that well sorry

Find the missing coefficient. (5d − 7)(5d − 6) = 25d2 ++ 42 5 65 –5 –65

Answers

Answer:

-65d

Step-by-step explanation:

(5d − 7)(5d − 6)

$(5d - 7)(5d - 6)$

Multiply it using FOIL method to find the missing term

Multiply 5d inside the second parenthesis and then multiply -7 inside second parenthesis

$5d \cdot 5d= 25d^2$

$5d \cdot -6= -30d^2$

$-7 \cdot 5d=-35d$

$-7 \cdot -6=42$

Now write all the terms together

$25d^2-30d-35d+42$

Combine like terms

$25d^2-65d+42$

HEre -65d is missing

i do believe it is -65d because the equation will look like this in the end
-65d=-65d.

Question 1 of 25Steps for solving 4(3x - 6) = 24 are shown.

43x - 6) = 24

12x - 24 - 24

12x - 24+24 = 24 +24

12x = 48

12x

48

12 12

X = 4

Original Equation

Step 1

Step 2

Step 3

Step 4

Step 5

Which of these is not part of the solution process?

O A. Adding 24 to both sides to isolate the variable term

B. Using the distributive property

E PREVIOUS

Answers

Answer:

x = 4

Step-by-step explanation:

The given equation is as follows :

4(3x - 6) = 24

If we want to solve the above equation, the steps are:

Using distributive property first as:

4(3x)-4(6)=24

12x-24=24

Adding 24 both sides,

12x-24+24=24+24

12x=48

x=4

So, the value of x = 4. All given steps are correct.

Simplify the following expression.
11x^2+9–2x–8x^2 - 6x

Answers

Answer:

3x^2-8x+9

Step-by-step explanation:

11x2+9−2x−8x2−6x

Subtract 8x2 from 11x2.

3x2+9−2x−6x

Subtract 6x from −2x.

3x2+9−8x

Move 9.

3x^2−8x+9

Hope this helps! :) Plz mark as brainliest

Answer: 3x^2-8x+9

Step-by-step explanation:

11x2+9−2x−8x2−6x

Subtract 8x2 from 11x2.

3x2+9−2x−6x

Subtract 6x from −2x.

3x2+9−8x

Move 9.

3x^2−8x+9

Thank you :)

In the past, 21% of all homes with a stay-at-home parent, the father is the stay-at-home parent. An independent research firm has been charged with conducting a sample survey to obtain more current information. (a) What sample size is needed if the research firm's goal is to estimate the current proportion of homes with a stay-at-home parent in which the father is the stay-at-home parent with a margin of error of 0.09? Use a 95% confidence level. (Round your answer up to the nearest whole number.)

Answers

Answer:

A sample size of 79 is needed.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{(\pi(1-\pi))/(n)}$

In which

z is the zscore that has a pvalue of $1 - (\alpha)/(2)$ .

For this problem, we have that:

$\pi = 0.21$

The margin of error is:

$M = z\sqrt{(\pi(1-\pi))/(n)}$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - (0.05)/(2) = 0.975$ , so $Z = 1.96$ .

What sample size is needed if the research firm's goal is to estimate the current proportion of homes with a stay-at-home parent in which the father is the stay-at-home parent with a margin of error of 0.09?

A sample size of n is needed.

n is found when M = 0.09. So

$M = z\sqrt{(\pi(1-\pi))/(n)}$

$0.09 = 1.96\sqrt{(0.21*0.79)/(n)}$