Chapter 8 Review

Equations

100

2x+5=4x+x-4

3

200

-(3x+8)+2x=-5x-4

x=1

300

What is the rule for this table?

x     -1  0  2  3

y      2  4  8  10

y= 2x + 4

400

1/3 +2m = m - 3/2

m=-11/6

500

Write an equation for the table:

x   -3    0   3   6   9

y  -18  -9   0   9   18

y= 3x-9

Scientific notation

100

Write 8,907,000 in scientific notation

8.907 x 10⁶

200

Write 6.25 x 10^-5 in standard form

0.00006

300

How do you write 0.000945 in scientific notation?

9.45 x 10^-4

400

Solve:

(3.51 x 10⁸)(4.9 x 10³)

1.7199 x 10¹²

500

Solve: 

(3.4 x 10²) + (4.57 x 10³)

4.91 x 10³

Exponents

100

Simplify:

5⁶ * 5²

5⁸

200

Simplify:

(7⁹)³

7²⁷

300

Simplify:

9³/9⁷

9^-4

400

(x⁴y³/(x²y^-1)⁴)⁰

1

500

x³5⁴/(x²5)²

x^-15²

Interest

100

Trey has $1200 in his account. He gets 8% simple interest every month. How much money has he gotten from interest after 8 years?

768

200

Derek has $1400 in his account. He gets 5% simple interest every year. How much money total has he earned after 10 years?

2100

300

Sam has $900 in his account. He gets 3.66% compound interest every year. How much money has he earned in total after 5 years?

1077.21

400

Harry has $5,436 in his account. He gets 6.21% compound interest every year. How much interest has he earned after 7 years?

2851.76

500

Mary has $8,476 in her account. She has $10,652 after 10 years what is her interest rate percentage if she gets annual simple interest? 

2.567%