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3 years ago

How to do this question?

Mathematics

1 answer:

diamong [38]3 years ago

3 0

Remark

Drawing that diagram was a very good idea. If you can picture something happening, you are half way there. I tend to use a table, but the diagram will come to the same thing.

Olivia Dawn

Start 176 80

Donate x x Subtract

What's left 176 - x 80 - x

Equation

176 - x = 5*(80 - x) Olivia had 5 times as many books as Dawn did. Remove the brackets.

Solution

176 - x = 400 - 5x Add 5x to both sides

176 + 5x - x = 400 Combine terms on the left

176 + 4x = 400 Subtract 176 from both sides

4x = 400 - 176 Combine terms on the right.

4x = 224 Divide by 4

x = 224/4

x = 56 Answer

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7x+16=8x+15 solve for x and y

elena55 [62]

Answer:

x = 1

Step-by-step explanation:

7x + 16 = 8x + 15

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2 years ago

Divide. Express the quotient in simplest form. x^2−x−12/2x^2÷x^2+x−6/2x^3

sertanlavr [38]

Hey there!

These are technically expressed as fraction. When you divide a fraction by another, you can replace the second fraction with its reciprocal and you can now multiply the fractions together instead.

$\frac{x^2-x-12}{2x^2} / \frac{x^2+x-6}{2x^3}$

$\frac{x^2-x-12}{2x^2} * \frac{2x^3}{x^2+x-6}$

Now, just multiply across the top and the bottom. You can first cancel out any terms that are repeated or similar.

$\frac{12}{2x^2} * \frac{2x^3}{-6}$

$\frac{2}{x} * \frac{1}{-1}$

$\frac{2}{-x}$

Your answer will be $\frac{2}{-x}$ .

Hope this helped you out! :-)

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3 years ago

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