A contractor bought 7.6ft to the power of 2 of sheet metal. She has used 3.5ft to the power of 2 so far and has 73.80 dollars worth of sheet metal remaining. The equation 7.6x - 3.5x =73.8 represents how much sheet metal is remaining and the cost of the remaining amount. How much does sheet metal cost per square foot?

$18 per ft²

Step-by-step explanation:

x = cost of 1 squared foot of sheet metal

Just do some subtraction

7.6x - 3.5x = 73.8

4.1x = 73.8

Divide both sides by 4.1

4.1x/4.1 = 73.8/4.1

x = 18

$649.60

step-by-step explanation:

unless you made a typo, the answers are both a and c.

step-by-step explanation:

1.5/3 is .5 whereas 3/9 is .3333333 not proportional

22/33 is .66666 and 4/6 is also .66666 proportional

2/4 is .5 whereas 142/213 is .66666 not proportional

14/7 is 2 and 7/3.5 is also 2 proportional

you could've also checked it by doing this simple division:

if the larger fraction divides with the smaller fraction to equal 1, it is proportional. so let me show you what i mean:

when i divide 22/33 by 4/6 i get 1, so we know it is proportional, and it is the same with 14/7 and 7/3.5. now if i divide 3/9 by 1.5/3 i get .66666 so therefore we know it is not proportional.

there are many ways to do this so i wanted to show you some possible ways.