A contractor uses the expression

7 (x + 3) to find the length in feet of chain that he needs for a certain project.

The contractor needs four chains that are the this length what is the total length of all of the chains

Part b the contractor needs another chain that is 50% longer than the first chain write an expression he can use to find the length of this chain explain how you know your expression is correct

Question

Mathematics

Yareli Weaver

12 March, 16:57

A contractor uses the expression

7 (x + 3) to find the length in feet of chain that he needs for a certain project.

The contractor needs four chains that are the this length what is the total length of all of the chains

Part b the contractor needs another chain that is 50% longer than the first chain write an expression he can use to find the length of this chain explain how you know your expression is correct

+4

Answers (1)

Know the Answer?

Rosalind · Answer 1

The length of the chain is 7 (x+3).

Four times this would be 4 (7 (x+3)) = 28 (x+3) = 28x+84

(either answer is good depending on whether you should distribute or not)

50% longer than this would be 1.5 (7 (x+3)) = 10.5 (x+3) = 10.5x+31.5

(to be 50% longer, we multiply by 1.5 ... 1 whole + 1 half)

We could write this in other different ways, such as 21 (x+3) / 2 = (21x+63) / 2 ...