Chapter 10 Review

Joseph lost 2 of his pens. p − 2

A number increased by 6 is 20. = 20

Algebraic Expression p − 2 Algebraic Equation n + 6 = 20 Numerical Expression 20 ÷ 4 Numerical Equation 7 × 5 = 35

2 times a number, divided by 3 ÷ 3 2n 3

a number decreased by 7, multiplied by 3 ( ) n − 7 × 3

the product of a number and 3

5 less than a number equals 12 = 12

the sum of 16 and 12 16 + 12

a number divided by 5, increased by 2 + 2 n 5 + 2

3(2n) (3 × 2) × n 6 × n 6n

8x + 2 + 5x 8x + 5x + 2 13x + 2

4(3x + 2) 12x + 8

s + s + s + s 4s

y + y 2y 8y + (5 + 6y) 8y + (6y + 5) (8y + 6y) + 5 14y + 5 4(3y) 12y 2(5y + 7) 10y + 14

a = 4 (20 + a) ÷ 3 (20 + 4) ÷ 3 24 ÷ 3 8

b = 3 5b − 9.7 5 × 3 − 9.7 15 − 9.7 5.3

subtract 9 from each side n + 9 = 14 subtract 9 from each side 2a = 8 divide both sides by 2 x 3 m − 5 = 12 add 5 to each side = 4 multiply both sides by 3

a + 7 = 15 a + 7 − 7 = 15 − 7 a = 8 8 + 7 = 15

= 3 x 7 n − 3 = 7 n − 3 + 3 = 7 + 3 8a = 16 8 8 x 7 ∙ 7 = 3 ∙ 7 a = 2 n = 10 x = 21

Samantha has 48 coins in her collection Samantha has 48 coins in her collection. This amount is 16 coins less than Mia has in her collection. How many coins does Mia have? Samantha has 48 coins in her collection. This amount is 16 coins less than Mia has in her collection. How many coins does Mia have? 48 = m − 16

m = number of coins that Mia has 64 = m m = number of coins that Mia has

x < 6 −1 1 2 3 4 5 6 7 8 9 −2 −3 −4 −5 −6 −7 −8 −9

x > 6 −1 1 2 3 4 5 6 7 8 9 −2 −3 −4 −5 −6 −7 −8 −9

x > 2 if x = 7 7 > 2 yes y < −2 if y = 1 1 < −2 no

Complete #1−44 (even) on Student Text pp. 230−31.