A. 55 x 5
b. 55 - 40
c. 55 x 5 - 40 x 5
d. 55/5 - 40/5

in geometry, parallel lines are lines in a plane which do not meet; that is, two lines in a plane that do not intersect or touch each other at any point are said to be parallel. by extension, a line and a plane, or two planes, in three-dimensional euclidean space that do not share a point are said to be parallel.

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

question 1: step-by-step explanation:

1/4 of 84 = 84÷4= 21

x = 1/2

step-by-step explanation:

hope this !