3 years ago

USING YOUR MATH

Mathematics

1 answer:

Eddi Din [679]3 years ago

8 0

Answer:

$area = \pi {r}^{2} \\ = \frac{22}{7} ( { \frac{22}{2} )}^{2} \\ = 380 \: sq \: feet$

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A rectangle has a length that is 9 feet less than four times its width. Its area is 90 square feet

kramer

Answer:

The length of rectangle is $15\ ft$

The width of rectangle is $6\ ft$

Step-by-step explanation:

Let

x-----> the length of rectangle

y----> the width of rectangle

we know that

The area of rectangle is equal to

$A=xy$

$A=90\ ft^{2}$

$90=xy$ -----> equation A

$x=4y-9$ -----> equation B

substitute equation B in equation A and solve for y

$90=(4y-9)y$

$4y^{2}-9y-90=0$

using a graphing calculator

The solution is

$y=6\ ft$

Find the value of x

$x=4y-9$ -----> $x=4(6)-9=15\ ft$

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4 years ago

28+12<br> —————<br> 13-5<br> 7th Grade Math Book (McGraw-Hill) page 9 exercise 26

LiRa [457]

28+12 is 40 and 13-5 is 8 !!

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3 years ago

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14a - (2a +9)=2/3 (12a-18)

Dmitrij [34]

Answer: a=-0.75

Step-by-step explanation:

14a - (2a +9)=2/3 (12a-18)

14a - 2a -9=2/3 * 6(2a-3)

12a-9=2*6/3 (2a-3)

12a-9=2*2(2a-3)

12a-9=4(2a-3)

12a-9=8a-12

4a-9=-12

4a=-3

a=-3/4

a=-0.75

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Please please help please please. Answer as soon as possible please and thank you. Will give brainly

Romashka [77]

Create and don’t give up.

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3 years ago

Figure ABCD is a parallelogram.

Aleonysh [2.5K]

Answer:

13.

Step-by-step explanation:

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4 years ago

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