3 years ago

Fred can paint a 30-foot fence in 5 hours. Which of the following is true?

Mathematics

1 answer:

Eduardwww [97]3 years ago

8 0

Answer:

lol

Step-by-step explanation:

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Please someone who to help me to solve this question.

Lorico [155]

First you have make the 2 and a half into 5/2. Then you have to find a common denominator of the two fractions, which would be 8. So the 7/8 you dont need to do anything to but the 5/2 you do... so multiply both the top and the bottom by 4 so you can get 8 on the bottom. that would be 20/8. now you can add them. so 7/8 + 20/8 = 27/8

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3 years ago

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(a2 + 2a + 1)(a + 1)

GrogVix [38]

$(a^2+2a+1)(a+1)=(a^2)(a)+(a^2(1)+(2a)(a)+(2a)(1)+(1)(a)+(1)(1)\\\\=a^3+a^2+2a^2+2a+a+1=\boxed{a^3+3a^2+3a+1}$

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3 years ago

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If the side of a rectangular prism is doubled, how would this affect the area? How about the volume?

professor190 [17]

Answer:

Step-by-step explanation:

The area will be increased by 4 times and volume will be increased by 8 times

Area of rectangular prism = 2 (lb+bh +hl)

When sides are doubled, Area = 2 (2l * 2b +2b *2h + 2h*2l)

= 4 * 2 (lb+bh +hl)

Volume of rectangular prism = lbh

When sides are doubled, Volume = 2l * 2h * 2b = 8 lbh

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3 years ago

What words match the expression 3+(4x12)

kicyunya [14]

51 Divide what's in the ( ) then add the 3

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3 years ago

The exchange rate is: £1 = €1.12. How much £ would I get for €336

SVETLANKA909090 [29]

£1 = € 1.12
£ x = € 336

Create proportions
Cross multiply
Divide
You will eventually find the answer

Proportions
$\frac{1}{1.12} = \frac{x}{336}$

cross multiply
336 = 1.12x

Divide to isolate x
$\frac{336}{1.12} = \frac{1.12x}{1.12}$
1.12 and 1.12 cancels out

300 = x

£300 = €336

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3 years ago