Question

The Italian size of a suit jacket is N centimeters, where N is the linear distance between the armpits. The American size of a suit jacket is 2.5P centimeters, where 2.5P is twice the linear distance between the armpits. If, for a particular jacket, N = P + 10, which of the following is closest to the value of N?

Answer 1

N =50

Step-by-step explanation:

In this case we have to write the two equations they give us and try to solve them

N = P +10

They say 2.5P is twice the distance between the armpits

2.5P = 2N

We see that they are two equations with two unknowns, so they can be solved substitute in the first

N = (2 / 2.5) N + 10

N [1 - 2 / 2.5] = 10

N [1 - 0.8] = 10

N = 10 / 0.2

N = 50 cm