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Vikki [24]
3 years ago
10

A sheet of metal is 9 inches longer than it is wide, and its total area is 252 square inches. Find the dimensions of the sheet o

f metal.
If w represents the width of the metal sheet, which of the following equations is a model for the given word problem?


A.
(3, –7)
B.
(–2, 7) and (3, –3)
C.
(3, 3)
D.
(2, 7) and (3, 9)
Mathematics
1 answer:
erastova [34]3 years ago
7 0
(9+w)w=252 or w(w+9)=252.
The quadratic equation applies: w²+9w-252=0=(w+21)(w-12), so w=12, because a negative zero is meaningless.
So the dimensions are width=12 in and length=21 in.
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2 years ago
I need help on it, I don’t know what I’m supposed to do
bogdanovich [222]

Answer:

The length of river frontage for each lot are 96.55 ft. 98.85 ft, 101.15 ft and 103.45 ft.

Step-by-step explanation:

See the attached diagram.

The river frontage of 400 ft will be divided into 84 : 86 : 88 : 90 for each lot as AP, BQ, CR, DS and ET all are parallel.

Therefore, PQ : QR : RS : ST = 84 : 86 : 88 : 90 = 42 : 43 : 44 : 45

Let, PQ = 42x, QR = 43x, RS = 44x and ST = 45x

So, (42x + 43x + 44x + 45x) = 400

⇒ 175x = 400

⇒ x = 2.2988.

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QR = 43x = 98.85 ft.

RS = 44x = 101.15 ft and  

ST = 45x = 103.45 ft

(Answer)

6 0
3 years ago
Kaylynn read 380 pages of her book last week. She read the same number of pages each day for 5 days.How many pages did Kaylynn r
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Answer:

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Step-by-step explanation:

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3 years ago
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Answer:

Hello There!!

Step-by-step explanation:

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hope this helps,have a great day!!

~Pinky~

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