Creating & Solving Equations

Riley charges a $10 fee just to show up, and then $8 a minute to play piano for events. What equation shows how much she charges for x minutes of piano playing?

• 10x+8=y

• 8x+10=y

• 10+x+8=y

• 10xy=8

There are 37 more cats c than dogs d at the shelter. If there are 78 cats at the shelter, which equation represents the relationship between the number of cats and dogs?

• d+37=78

• d-37=78

• c+37=78

• c-37=78

The total cost, C, is 13 times the number of books bought, n.

What equation represents this?

• c=13n

• n=13c

• c-n=13

• n/13=c

Parker has $17 in his wallet. He has only $5 and $1 bills, but there are 5 total bills. How many $5 bills does he have?

• 1

• 2

• 3

• 0

Parker has $17 in his wallet. He has only $5 and $1 bills, but there are 5 total bills. How many $5 bills does he have?

• 1

• 2

• 3

• 0

Solve for h.

g+3h=i

• h=(i-g)/3

• h=3ig

The formula for volume of a rectangular prism is V=LWH. Which formula solves for L?

• L=WH/V

• L=V/WH

• L=V-WH

• L=VWH

Solve for z.

x=yz

• z=yx

• z=x/y

• z=y/x

• z=x-y

Alexis has a pile of dimes and quarters. The total value is $5.80. Which of the following systems of equations can be used to find the number of dimes and quarters she has?

• d+q=5.80

  40d+40q=5.80

• d+q=5.80

  0.1d+0.25q=5.80

• d+q=40

  0.25d+0.1q=5.80

• d+q=5.80

  10d+25q=5.80

The total cost, C, is 13 times the number of books bought, n.

Identify the independent and dependent variable.

• c=independent

  n=dependent

• n=independent

  c=dependent