1) Salma has a garden in trapezoid shape. She wants to build a fencing around the garden.

- The length of a fencing of a garden is 39a-7.

- Three sides have the following lengths: 9a, 5a+1, and 17a-6.

a) Write an equation that can be used to identify the length of the fourth side.

b) Solve your equation to find the length of the fourth sides of the garden.

a) 39a - 7 = 9a + 5a+1 + 17a-6 + X

b) 8a - 2

Step-by-step explanation:

Let X be the length of the fourth side

39a - 7 = 9a + 5a+1 + 17a-6 + X

39a - 7 = 31a - 5 + X

X = 39a - 7 - 31a + 5

X = 8a - 2

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.