Equations and Inequalities Test Review

The total number of students in the seventh grade is 9 more than 4 times as many students as are in the art class. There are 101 students in the seventh grade. Write an equation to find the number of students in the art class. Let x represent the number of students in the art class. Write an equation

• $5x+9=101$

• $4+9=101$

• $4x\ +9\ =101\$

• $7x-101=9$

 $4x+9=101$  solve for x

• x=23

• x=37

• x=27.5

 $5x-6=44$  solve for x

• x=7.6

• x=10

 $4y+3=19\$  solve for y

• y=4

• y=5.5

 $\frac{1}{2}n-3=5$  Solve for n

• n=16

• n=4

There are 450 seats in the lower level of a concert hall with b balcony seats in the upper level. So far, 170 tickets have been sold, which is 1/5 of the total number of seats in the concert hall. How many tickets sold are balcony seats? (Write an equation using Distributive property)

• $\frac{1}{5}\left(450+b\right)=170$

• $450\left(\frac{1}{5}+b\right)=\ 170$

• $450\left(b+\frac{1}{5}\right)=170$

 $-4(8+y)=90.$  Solve for y

•  $y=122$  

•  $y=30.5$  

•  $y=-30.5$  

Carson’s wheelbarrow can hold 345 pounds. If he has 121 pounds of rock in the wheelbarrow, what number of pounds, p, can he put in the wheelbarrow without going over. Is this going to be an Equation or an Inequality based on the wording in this problem.

• Equation

• Inequality

Carson’s wheelbarrow can hold 345 pounds. If he has 121 pounds of rock in the wheelbarrow, what number of pounds, p, can he put in the wheelbarrow without going over the weight limit?

• $p+121\ \le345$

• $p-121\ \le345$

• $p+121\ =345$

 $p+121\ \le345$  Solve for p

•  $p\ge224$  

•  $p\le224$  

•  $p\le466$