Question

Last two step equation, please help me thank you.

Answer 1

To determine the equation of the normal price, set the equation.

Total = t; cookie = c; normal = n; original (price)= o

t = n(c)

Right now, if you buy 7 of them, it will cost 2.80

2.80 = n(7)

Isolate the n. Divide 7 from both sides

(2.80)/7 = (7n)/7

n = 2.80/7

n = 0.40

normal price is 40 cents.

You are finding the original price = o

o = 0.40 + 0.75

o = 1.15

Equation for each cookie original price:

t = o(c)

original price: $1.15

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