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3 years ago

If u dont know the answer then dont say nothing if u do pls help

Mathematics

1 answer:

Lapatulllka [165]3 years ago

7 0

answer:

x = 0.875

explanation:

4 ( 5 - 7x ) = 6 - 12x

20 - 28x = 6 - 12x

20 - 6 = -12x + 28x

14 = 16x

x = 14/16

x = 7/8

x = 0.875

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the width of a rectangle is 7 meters greater than its length.If the area of the rectangle is 170 square meters, write the quadra

Anika [276]

Answer:

$x^2+7x-170 = 0$

Step-by-step explanation:

To calculate an area of a rectangle, use the formula A=l*w. We know the width is 7m greater than the length. So w = 7 + x. So the area is A= (7+x)*x.

We also know the area is 170. Substitute this value for A and solve.

$170 = (7+x)(x)\\170 = 7x+x^2\\x^2+7x-170 = 0$

4 0

3 years ago

Please help! Will give brainliest! Don't give a like.

den301095 [7]

9514 1404 393

Answer:

fraction
denominator
product
numerator

Step-by-step explanation:

When you multiply a fraction by a whole number, the denominator in the product is the same as the denominator of the fraction. The numerator in the product is the product of the whole number and the numerator of the fraction.

That's the rule. It is derived from the fact that multiplication indicates repeated addition.

$\dfrac{2}{7}\times3=\dfrac{2}{7}+\dfrac{2}{7}+\dfrac{2}{7}=\dfrac{2+2+2}{7}=\dfrac{2\times3}{7}\qquad\text{for example}$

7 0

3 years ago

Which equations are true for x = –2 and x = 2? Check all that apply.

Katyanochek1 [597]

Hi Brainiac

x² - 4 = 0

Add 4 to both sides

x² - 4 + 4 = 0 + 4

x² = 4

Now take the square root

x= +/-√4

x= 2 or x= -2

The answer is A

I hope that's help :)

3 0

3 years ago

At the school carnival, Jade has a game booth with a spinner. The banner at her booth reads "70% chance of winning!" What is the

Ronch [10]

The answer is 30% because if there is a 70% chance then minus 70% from 100% you get 30%

8 0

3 years ago

Read 2 more answers

To decrease an amount by 20%, what do you multiply by?

klemol [59]

An entire amount is 100%.
If you decrease it by 20%, you end up with 80% of the entire amount.
To find 80% of an amount, multiply the amount by 0.8

Answer: multiply by 0.8

4 0

3 years ago