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4 years ago

HELP! 20 POINTS

1 answer:

7 0

Work problems are solved by first figuring out how much of the job they can do in each hour. Shawn can do 1/4 of the job in an hour and Ellie can do 1/6 of the job in an hour. 1/6+1/4=2/12+3/12=5/12. This means that they can do 5/12 of the job an hour. This means that together they can do the job in 2 2/5 hours. The foreman is obviously wrong because first of all Shawn can do it alone in 4 hours, so with Ellie he will do it faster, and second of all 2 2/5<5. Hope this helped!

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Anarel [89]

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3 years ago

A snail is at the bottom of a well. In the first 10 minutes, the snail climbs 23 7/12 inches. In the next 10 minutes, it clims 1

Alekssandra [29.7K]

I believe that the snail would be 43 5/12 inches away from the bottom after 20 minutes.

4 0

4 years ago

Read 2 more answers

9(3x + 8) – 3(4x + 21)

Ann [662]

Answer:

15x + 9

Step-by-step explanation:

9(3x + 8) – 3(4x + 21)

Multiply

27x + 72 - 12x - 63

Combined like terms

27x - 12x = 15x 72 - 63 = 9

15x + 9

5 0

4 years ago

Read 2 more answers

Need help with equations with variables on both sides, giving 100 points, tysm if you help :) 6 (2x-4) = 8(x +2) A. 3 B. 10 C. 2

scoundrel [369]

Answer:

B. 10

C. All real numbers.

Step-by-step explanation:

6 (2x-4) = 8(x + 2)

Distribute the numbers outside of the factors:

12x - 24 = 8x + 16

Subtract both sides by '8x'

12x - 8x - 24 = 8x - 8x + 16

4x - 24 = 16

Add '24' to both sides:

4x = 40

Divide both sides by 4:

x = 10. Therefore, B. 10 is the correct answer.

3(4p - 2) = -6(1 - 2p)

Distribute the numbers similarly to the example before:

12p - 6 = -6 + 12p

Subtract '12p' from both sides:

12p - 12p -6 = -6 + 12p - 12p

0 -6 = -6

Add '6' to both sides:

0 - 6 + 6 = -6 + 6

0 = 0

Therefore, the solution consists of all real numbers.

3 0

3 years ago

A ladder leans against the side of a house. The angle of elevation of the ladder is 66 degrees when the bottom of the ladder is

Ierofanga [76]

Answer:

The length of the ladder = 6.5077 ft

Step-by-step explanation:

Given A ladder leans against the side of a house

Given the angle of elevation of the ladder is 66° when the bottom of the ladder is 16 ft from the side of the house

Let 'C' be the point of observation.

Given CA= 16 ft

From right angle triangle

$cos C = \frac{CB}{CA}$

$cos 66 = \frac{x}{16}$

x = 16 × cos 66°

x = 16 × 0.4067

x = 6.5077

x = 6.5 ft

The length of the ladder = 6.5 ft

7 0

4 years ago