Question

Suppose y varies directly as x. If x = 15 when y = 12, find x when y = 21.

Answer 1

Answer:

x=26.25

Step-by-step explanation:

Let y=kx

12=15k

k=$k=\frac{12}{15} \\again 21=\frac{12}{15} *x\\x=21*\frac{15}{12} =\frac{105}{4} =26.25$