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SVETLANKA909090 [29]
3 years ago
12

PLEASE HELP

Mathematics
1 answer:
WINSTONCH [101]3 years ago
8 0
A) Total cost of materials: 145.86 + 52.91 + 17.63 = $216.40
b) Percent cost of hardware: 17.63/216.40 = 0.081
c) Percent cost paint and hardware: (17.63 + 52.91)/216.40 = 0.326
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Find the product of -2x a(-4x b - 2x 3 + 5x)
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Answer:

        2                   2

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Step-by-step explanation:

(the twos are exponents)

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2 years ago
A rectangular bedroom is 4 ft longer than it is wide. Its area is 140 ft2. What is the width of the room? ft
steposvetlana [31]

Answer: width = 10 ft

Step-by-step explanation:

Area = length × width

Let l be length and w be width

l = w + 4 ........equation (1)

From above formula

140 = l × w. ........equation (2)

Substitute equation (1) into equation (2)

140 = (w+4) × w

w^2 + 4w= 140

w^2 + 4w - 140= 0

By factorization method

(w+14)(w-10)= 0

w=-14 or w= 10

So now width is 10 ft

From equation(1)

l=w+4

l= 10+4

l= 14 ft

Width = 10 ft and length = 14 ft

3 0
3 years ago
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Sindrei [870]

Answer:

c

Step-by-step explanation:

3 0
3 years ago
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GuDViN [60]

Step-by-step explanation:

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4 0
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4 0
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