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4 years ago

Solving systems by elimination 9x+3y=-3 2x-3y=-8

Mathematics

1 answer:

Alona [7]4 years ago

5 0

Answer:

Solve for the first variable in one of the equations, then substitute the result into the other equation.

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Step-by-step explanation:

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Solve each equation by taking square roots. Show your work. Simplify your answers. Do not write your answers in decimal form.

Kipish [7]

Answer:

Move the constant to the right. Step 3: Take half of the x-term coefficient and square it. Add this value to both sides. Step 4: Simplify right side. Step 5: Write the perfect square on the left. Step 6: Take the square root on both sides of the equation. Step 7: Solve for x. Solve equation x2 - 4x + 3 = 0.

Step-by-step explanation:

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3 years ago

Find the gradients of the lines A and B. <br> a) Gradient of A is __ <br> b) Gradient of B is __

Shkiper50 [21]

Answer:

Kkķķkkkkkkkkkkkkkk

Step-by-step explanation:

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3 years ago

Using rules of long division divide 262 by 9

Pavel [41]

After Dividing It I Got, 29 r 1.

So That would be your answer.
Have A Wonderful day :)

7 0

3 years ago

Read 2 more answers

In a study of the accuracy of fast food drive-through orders, Restaurant A had 295 accurate orders and 55 that were not accurat

Afina-wow [57]

Answer: (a) $14.5\%$

(b) Restaurant B has a significantly lower percentage of orders that are not accurate.

Step-by-step explanation:

Confidence interval for population proportion is given by :-

$\hat{p}\pm z_{\alpha/2}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

Given: Significance level : $\alpha: 1-0.95=0.05$

Critical value : $z_{\alpha/2}=1.96$

For Restaurant A , The proportion of orders not accurate : $p=\dfrac{55}{295}\approx0.19$

Then , the Confidence interval for population proportion will be :-

$0.19\pm (1.96)\sqrt{\dfrac{0.19(1-0.19)}{295}}\\\\=0.19\pm0.045=(0.145,0.235)=(14.5\%,23.5\%)\\\\\text{i.e.}14.5\%$

Also, 95% confidence interval for the percentage of orders that are not accurate at Restaurant B: $0.138$

By comparing both the lower confidence limit and upper confidence limit of the interval for Restaurant B is lower than the lower confidence limit of t and the upper confidence limit of the interval for Restaurant A.

Therefore, Restaurant B has a significantly lower percentage of orders that are not accurate.

3 0

3 years ago

If f(x) = x-5 and g(x) = 3x2-1,<br> what is (fºg)(x)?

Kobotan [32]

Answer:

Step-by-step explanation:

f(x) = x - 5

g(x) = 3x² - 1

To find (fºg)(x) substitute g(x) into f(x) that's for every x in f (x) replace it with g (x)

That's

We have the final answer as

Hope this helps you

4 0

4 years ago