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Algebra 1

2. Subtract the matrices:
[-1 7] [-6 -9]
[11 6] [-3 4]

3. Find the product:
(-6) (-1) (7) (-11)

4. What is the correct way to read "-x" aloud?

5. Solve for b:
D=abc

6. Solve for r:
20q+2r=4

7. 5-4(x-5) =9

9. Solve:
4(x-5) =4x-20

Solve for p:
5.5pr=3x-7pr=11q2+10pr

In 1992, the population of Seoul, South Korea was 17,334,000. In 1995, the population of Seoul was 19,065,000. Find the average of change of the population in people per year.

In 1990, the number of motor registered in the United States was 4.3 million. In 1996, the number of registered motorcycles was 3.8 million. Find the average rate of change of the number of registered motorcycles in motorcycles per year.

Use the given values to write an equation that relates x and y.

x=3, y=15

x=6, y=3

x= -4, y= -4

x=10, y= -2

x=3.5, y=7

x=-12, y=4

Solution Preview

The answers are attached.

9. Solve:
4(x-5) =4x-20
Left hand side = ...

$2.19