Question

If Jasper installs a floor himself, it will take him 7 hours. Working with Yolanda, it will take them 3 hours.

Answer 1

Answer: 5$\frac{1}{4}$ hrs

Explanation:

Jasper: $\frac{1}{7}$ per hr

Yolanda: $\frac{1}{x}$ per hr

Together: $\frac{1}{3}$ per hr

Jasper + Yolanda = Together

$\frac{1}{7}$ + $\frac{1}{x}$ = $\frac{1}{3}$

$(21x)\frac{1}{7}$ + $(21x)\frac{1}{x}$ = $(21x)\frac{1}{3}$

3x + 21 = 7x

        21 = 4x

        $\frac{21}{4}$ = x

         $5\frac{1}{4}$

                                                                                               

Answer 2

Answer:

this is the rest of the question

Step-by-step explanation:

If they work together, what is the missing value in the table that represents the part of the floor Jasper will install?

anyone got the answer?