8th Grade Math

Real Numbers

100

Rational Numbers can be written how.

As a fraction.

200

Write 55/60 as a decimal.

.9166..

300

Write .05 as a fraction.

1/20

400

Find the cube root of 1/125

1/5

500

What is the square root of 1600.

40

Linear Equations

100

What is the equation for Pythagorean Theorem.

a²+b²=c²

200

Solve: 15²+8²=c²

17

300

Solve: 12²+b²=20²

16

400

Can these measures construct a triangle?

7,15,6 Why?

no 7+6=13 

13<15

500

Solve  25+3b=154.97

43.31

Functions

100

In the given equation what is the input variable?

y=4x+4

x

200

Solve: d=7t+11 when "t"=7

60

300

What is y=mx+b

Slope intercept Form.

400

What is the slope of the line y=2x+2

2

500

Solve: 2x+5=6x+33

x=-7

Exponents

100

Write in standard form.   1.75X10⁷

17,500,000

200

Write in Scientific Notation.  .000421

4.21X10^-4

300

Multiply (3X10⁷)(5X10⁴)

1.5X10¹²

400

Divide 4⁵/4⁵

1

500

4.2/(5.5X10⁹)

7.6X10^-10

Systems

100

Solve the system of equations.

y=2x-1

y=-x+5

(2,3)

200

Which Method would you use to solve this system of equations. Why?

y=4x-1

2x+2y=3

Substitution

300

Solve the System of Equations.

5x-6y=-32

3x+6y=48

(2,7)

400

How many solutions does the system have? Why?

x+2y=10

x+2y=-6

None, x+2y cannot equal both 10 and -6.

500

Matt has 80 coins all nickles and dimes, with a total value of $6.75 how many total nickles and dimes does he have.

25 nickles 55 dimes