The length of a radius of a circle, measured in centimeters, is represented by the expression x + 1.5. The diameter of the circle is 93 cm
What is the value of x?
Enter your answer as a decimal or mixed number in simplest form in the box
X=

b, i believe, but not sure.

this is a direct variation proportion. y = kx

y is the total amount due, k is the constant of variation, and x is the number of texts sent.

plug in the 3.20 and the 16 to solve for the "k". this is the constant of proportionality. it is the value that will not change.

3.20 = k(16). solving you get $.20 per text.

the equation would then be y = .20x