Chapter 4 Variables and Ratios

m - 27 = 12

Q1a

• m=39

• 39

• m=15

• 15

72 = 55 + n

Q1b

• n=127

• 127

• 17=n

• n=17

During the hour before the football game started, m, tickets were sold. During the hour after the game started, n, tickets were sold. All the tickets cost $2. Which expression represents the amount of money collected during the two hours? Q2

• 2m + n

• 2n + m

• 2 (m+n)

• 2(m-n)

I'm thinking of a number. When I add 20, I get -5. What's my number? Q3

• 25

• -25

• 20

• -30

The rectangles on question 4 are similar. By what ratio was rectangle ABCD enlarged by to create rectangle KLMN? Use this information to find the missing side length. Q4

Triangle ABC on question 5 has been reduced to create triangle LMN. By what ratio has it been reduced? Q5

• 4:1

• 1:2

• 2:1

• 1:3

Triangle ABC has been enlarged (by side lengths) to create triangle XYZ. By what ratio was triangle ABC enlarged? Q6

• 4:1

• 2:1

• 3:1

• 1:3

Determine the value of each variable. Q7

• a=32 b=16

• a=19 b=32

• a=31 b=20

• a=32 b=19

Determine the value of the variables on question 8.

• n=14 x=27

• n=7 x=27

• n=7 x=9

• n=9 x=7

A square has a side length of c. Which of the following could be used to represent the perimeter of the square? Q9

• c+c

• c x c

• c x c x c x c

• c + c + c + c