A pancake recipe suggests that you use a 2/3 cup of water for every cup of pancake mix. If you plan to use 7/2 cups of the mix, how much water should you use?

2 1/3 cups of water

Step-by-step explanation:

7/2 cups of mix =3.5 cups of mix

3 cups of mix*2/3 cups of water=2 cups of water

2/3cups of water*.5 cups of mix=2/6 cups of water=1/3 cups of water

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a

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