HELP MATH IREADY MIDDLE SCHOOL (PICTURE) NO LINKS PLS

answer: #1 ads up by 8 and i don't know #2

(5x-1)^2= (5x)^2-2(5x)×1+(1)^2=25x^2-10x+1

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

i believe it’s 165 because if u add 137 and 58 u get 195 and then subtract that from 360 and there’s ur answer