Mike paid $2.94in sales tax on an item that cost $42.00 before tax. at that rate how much would he pay in sales tax for an item that costs $58.00 before tax ?

He would pay $4.06 sales tax for an item costs $58.00 before tax.

Step-by-step explanation:

Given:

Mike paid $2.94 in sales tax on an item that cost $42.00 before tax.

Now, at that rate find the sales tax for an item that costs $58.00 before tax.

So, we find the rate:

Sales tax rate = sales tax on item / cost of item before tax  ×  100

Now, we get sales tax on item costs $58.00:

Therefore, he would pay $4.06 sales tax for an item costs $58.00 before tax.

8(-10x+3.5y-7)

8×-10x + 8×3.5y + 8×-7

-80x + 28y - 56

therefore

-80x+28y-56 is the correct answer

42.4

step-by-step explanation:

convert to decimal