10. The cost of membership in a discount grocery club includes a month 6 months is $80, and the total cost of membership for 1 year is $110.

charge and a one-time joining fee. The total cost of membership for

Write and solve a system of equations to find the monthly charge and

the joining fee.

v = 1/3 a^2h

step-by-step explanation:

the volume is 1/3 a^2h.

or

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