Abcd is a rectangle. find the length of each diagonal.
ac=3y/5
bd=3y-4

18a

step-by-step explanation:

simply because it is. it's the highest common factor

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