In the ordered pair (12, -7), A. the abscissa is 12 and the
ordinate is
-7
B. the abscissa is -12 and the
ordinate is 7.
C. the abscissa is 7 and the
ordinate is -12
D. the abscissa is -7 and the
ordinate is 12.

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15

the answer is 5/14.

hope this .

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

the answer is

a.

x = 42

y = 10

i got it down chief.