Expressions, Equations, and Inequalities

There are no more than 18 students on the hall.

• s>18

• s<18

• s≤18

• s≥18

There are fewer than 150 children at the playground.

• c<150

• c>150

• c≤150

• c≥150

At least 25 cats are on my porch.

• c<25

• c>25

• c≤25

• c≥25

Grace has $45 at most in her purse.

• g<45

• g>45

• g≤45

• g≥45

Find and explain the error.

5 - 3 + 2

5 - 5

0

• There is no error.

• Addition was done first and you should have subtracted first

• They added wrong numbers

• Multiplied worng

Solve for x in 5x - 7 = 3

• x = 2

• x = 5

• x = 10

• x = 25

What is a combination of operations on variables and numbers called?

• An equation

• A mathematical statement

• An algebraic expression

• An operation

How are expressions and equations different?

• Equations have equal signs while expressions don't.

• Equations have variables while expressions don't.

• Expressions can be solved while equations can't.

• Equations are always true while expressions aren't.

How would you write a number increased by 7?

• 7n

• n + 7

• 7 - n

• 7/n

What do open circles mean when graphing inequalities?

• The range of values does not include the circle's point

• The range of values includes the circle's point