2 years ago

HELP ME PLEASE I NEED HELP ASAP JUST SOLVE THE EQUATION

Mathematics

1 answer:

alexandr402 [8]2 years ago

3 0

Answer:

x=18

Step-by-step explanation:

I hope this helps I just did mental math so im not sure

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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

$y=6\ ft$

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3 years ago

Simplify Question 8 options: A) 8 B) 9 C) 6 D) 12

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3 years ago

The sum of two numbers is 40 and their difference is 6.5, what is their product? show work please

Finger [1]

Let b>a,

a+b=40 so we can say a=40-b

We are told that b-a=6.5, using a found above in the equation gives us:

b-(40-b)=6.5

b-40+b=6.5

2b-40=6.5

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So a=16.75 and b=23.25

check...

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