1. Martin can pour a concrete walkway in 6 hours working alone. Victor has more experience and can pour the same walkway in 4 hours working
alone. How long will it take both people to pour the concrete walkway
working together?

2.4 hr. = time working together

Step-by-step explanation:

Let x = time working together

x/6 = work done by Martin

x/4 = work done by Victor

Martin's part + Victor's part = 1 jog done

x/6 + x/4 = 1  Multiply thru by 12

2x + 3x = 12

5x = 12

x = 2.4 hr.

The time taken to pour concrete on the walkway using their combined rate is 2 hours 24 minutes.

To solve :

Time taken by Martin = 6 hours

Time taken by Victor = 4 hours

Recall :

Rate = 1 ÷ time

Hence ;

Working together :

Therefore, the time taken if they work together will be :

Therefore, The time taken if they work together will be 2.4 hours.

Learn more :

step-by-step explanation:

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt