# Chapter 22

For each statement, make an equation in terms of x and then solve it.
"A number multiplied by four gives 32."
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Slide 1: Open question
MathematicsSecondary Education

This lesson contains 22 slides, with interactive quizzes.

## Items in this lesson

For each statement, make an equation in terms of x and then solve it.
"A number multiplied by four gives 32."

#### Slide 1 -Open question

If a number is subtracted from nine the result is -5.

#### Slide 2 -Open question

Represent each situation using an equation in terms of y. Then solve it.
"A number is multiplied by four, then 10 is added to get 50."

#### Slide 3 -Open question

When 10 is subtracted from four times a certain number, the result is 190.

#### Slide 4 -Open question

Three times the sum of a number and four gives 150.

#### Slide 5 -Open question

Solve each problem by setting up an equation.
"A number is doubled and then six is added. When this is divided by four, the result is seven. What is the number?"

Next Section

#### Slide 7 -Open question

A father is three times as old as his daughter. If the father is 31 years older than his daughter, what are their ages?

#### Slide 8 -Open question

Jess and Silvia have 420 marbles between them. If Jess has five times as many marbles as Silvia, how many do they each have?

#### Slide 9 -Open question

Soumik has $5 less than his friend Kofi. If they have$97.50 altogether, how much does each person have?

#### Slide 10 -Open question

Two competition winners are to share a prize of \$750. If one winner receives twice as much as the other, how much will they each receive?

#### Slide 11 -Open question

A grandfather is six times as old as his grandson. If the grandfather was 45 when his grandson was born, how old is the grandson?

Seat work
Numbers 6 to 10

#### Slide 13 -Open question

Chapter 20 Review

#### Slide 14 -Open question

Five sector angles in a pie chart are x* + 2x* + 5x* + 20* + 70*. Find the value of x in degrees.

#### Slide 15 -Open question

Mike marks in 5 tests are: 20, 2a, a, 30, 40. His mean mark is 27. What is the value of a?

#### Slide 17 -Open question

b. Inter-quartile range
c. number of students with a reaction time of more than 4 seconds.

Find the median.

#### Slide 19 -Open question

b. the 20th percentile

#### Slide 20 -Open question

c. the inter-quartile range

#### Slide 21 -Open question

d. the probability that a person chosen at random spends 2 hours or less in the museum.