Open Up Expressions and Equations

What is the title of topic 4?

• Represent Equations and Inequalities

• Represent and Solve Equations and Inequalities

• Numeric and Algebraic Expressions

• Use Positive Rational Numbers

Which of these expressions is equivalent to 3(x - 2)?

• 3x - 6

• 3x - 2

• 3x + 2

• 3x + 6

For the expression 4x + 3x, combine like terms and write an equivalent expression with fewer terms.

• 7x

• 12x

• 12x²

• 7x²

Which of these expressions is equivalent to -2(x -5)?

• -2x -10

• -2x - 5

• -2x + 10

• -2x + 5

• 15

• 12

• 18

• 21

Translate the following sentence into an equation: "Eight times a number, decreased by 13, is equal to 35."

Translate the phrase into an algebraic expression: "Seven less than twice a number."

The equation for the table below is y=2x+5, fill in the missing values.

c

d

e

f

7

4

9

0

3

-1

The table shows Sandra's weekly earnings, y , based on the number of hours she works. Which equation can Sandra use to calculate her weekly earnings when she works x hours?

​ (a)  

• y = 8x

• y = 5x + 40

• y = 10x

• y = 10x + 80