Arecipe uses 1 - cups of milk to make 10 servings. if the same amount of milk is used for
each serving, how many servings can be made using 1 gallon of milk?

answer:

hello : y =(2/3)x+5

step-by-step explanation:

hello : let   a(3,7)     b(6,9)

the slope is :   (yb - ya)/(xb -xa)

(9-7)/(6-3)   = 2/3

an equation is : y=ax+b     a is a slope

y = (2/3)x +b

the line through point   (3,7) : 7 = (2/3)(3)+b

b = 5

the equation is : y =(2/3)x+5

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answer:

n = 7     n=-7

step-by-step explanation:

n^2 - 49 = 0

this is the difference of squares

(a^ - b^2) = (a-b) (a+b)

n^2 -49   = (n-7) (n+7) =0

using the zero product property

n-7 = 0   n+7 =0

n-7+7 =0+7       n+7-7 = 0-7

n = 7     n=-7