Which statement best describes (3 × 4) × 6 = 3 × (4 × 6)?
a. a number multiplied by 0 has a product of 0.
b. the order of the factors is changed, but the product is the same.
c. the grouping of the factors is changed, but the product is the same.
d. the operations are different, but the product is the same.

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step-by-step explanation:

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.

answer: hence, function will be

explanation:

since we have given that

cost of a new textbook = $85

according to question, the resale value of a textbook decreases by 25% with each previous owner,

so, our function becomes,

here, y is the total value of the text book after x owners.

hence, function will be