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Artyom0805 [142]
3 years ago
10

The length of a rectangle is 4 inches more than its width. The area of the rectangle is equal to 4 inches less than 5 times the

perimeter. Find the length and width of the rectangle.
Mathematics
1 answer:
bija089 [108]3 years ago
4 0
P = 2(L + W)
L = W + 4
A = 5P - 4

P = 2(W + 4 + W)
P = 2(2W + 4)
P = 4W + 8

A = 5(4W + 8) - 4
A = 20W + 36

A = L * W
A = W(W + 4)
A = W^2 + 4W

W^2 + 4W = 20W + 36
W^2 - 20W + 4W - 36 = 0
W^2 - 16W - 36 = 0
(W + 2)(W - 18) = 0

W - 18 = 0
W = 18

L = W + 4
L = 18 + 4
L = 22

A = L * W
A = 18 * 22
A = 396

P = 4W + 8
P = 4(18) + 8
P = 72 + 8
P = 80

length = 22, width = 18, area = 396, perimeter = 80
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OleMash [197]

Answer:

increased = addition

twice = multiply by 2

is = equals

a number = x

16+2x=-56

subtract 16 from both sides

2x=72

divide by 2

x=36

Step-by-step explanation:

<h2>mark me a brainlist</h2>
4 0
3 years ago
Your credit card has a balance of $3300 and an annual interest rate of 14%. You decided to pay off the balance over two years. I
NARA [144]

9514 1404 393

Answer:

  • $137.90 more each month
  • $246.00 less total interest

Step-by-step explanation:

The amortization formula is ...

  A = P(r/12)/(1 -(1 +r/12)^(-12t))

for the monthly payment on principal P at annual rate r for t years. Here, we have P=3300, r = 0.14, and t=1, so the monthly payment is ...

  A = $3300(0.14/12)/(1 -(1 +0.14/12)^-12) ≈ $296.30

The payment of $296.30 is ...

  $295.30 -158.40 = $137.90 . . . more each month

The total amount paid is 12×$296.30 = $3555.60, so 255.60 in interest. This amount is ...

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3 0
3 years ago
Say you have a 68 for your math grade. And you got a 100 on a test. What will your math grade be now.
zzz [600]
Prob 70-74 depending on your school grading system
8 0
4 years ago
Can u pls help me with this question ​
saul85 [17]

Answer:

The answer is D, 43  \frac{1}{2}

Step-by-step explanation:

If the pile gets bigger by 8 \frac{7}{12} each week, and you want to find out how big the pile is after 3 weeks, then you have to multiply 8 \frac{7}{12\\} by 3 to find out how much the pile increased by.

8 \frac{7}{12\\} × 3 = 25 \frac{3}{4}

Now, you need to add this to your initial value to get the answer.

25 \frac{3}{4} + 17 \frac{3}{4} = 42 \frac{6}{4}

Now simplify.

43 \frac{1}{2}

3 0
3 years ago
Can someone please help how do you do it I don’t get it
disa [49]

Answer:

43.1

Step-by-step explanation:

Look at the picture! Double check my work but I am pretty sure I did it correctly.

8 0
3 years ago
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