Ta'Lor is baking for a cake sale. She has $40 to buy flour at $3 per pound and also $1 per pound of sugar. Which of the following equations represents her cost y in terms of x?

Question

y=3x-1

y=3x+40

y=-40+3x

y=-3x+40

Answer 1

None of the choices look right

the last 3 are all the same, the worst choices, and over budget all costing more than the $40 she has

that leaves only y=3x-1, the 1st choice

It at least has cost as $3 per pound of flour without adding that to $40 The $3 is part of the $40 is all is spent.

It's the "best" answer if this is a multiple choice question.

y=3x +1s with x = pounds of flour and s = pounds of sugar would best describe the cost

y=3x+s < 40

y = 3F + S < 40