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Fudgin [204]
2 years ago
15

Hellllpppppppp 10 pointssss

Mathematics
1 answer:
mr_godi [17]2 years ago
4 0

Answer:

A. 5.1

B. 0.96

C. 15

D. 8.3

Step-by-step explanation:

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An experience bricklayer can construct a small wall in 3 hours. An apprentice can complete the job in 5 hours. Find how long it
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Answer:

Step-by-step explanation:

If the bricklayer can construct the wall in its entirety in 3 hours, then he can get 1/3 of the job done in an hour.

If the apprentice can get the whole job done in 5 hours, then he can get 1/5 of the job done in an hour. If they both work together on said job, the equation is

\frac{1}{3}+\frac{1}{5}=\frac{1}{x} and now we solve for x. Multiply everything by the LCM to get rid of the fractions. That would be 15x:

15x(\frac{1}{3}+\frac{1}{5}=\frac{1}{x}) and doing that gives us

5x + 3x = 15 and

8x = 15 so

x = 1.875 hours which is 1 7/8 hours which is also 1 hour and 52 1/2 minutes.

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If f(x) = -x^3 + 2x^2 - 3, find f(2).<br><br> A) -19<br> B) -3<br> C) -1<br> D) 5
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Step-by-step explanation:

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