8th Grade Review MATH

8th

100

What transformation is created by sliding an object?

Translation

200

Solve for x:

x/5 + 2 = 1

-5

300

If point A (-4, -4) is reflected over the x axis, what would the new coordinates be?

(-4, 4)

400

Do the following lengths make sides of aright triangle?

a = 2, b = 6, c = 10

No

500

Convert to slope-intercept form.

y -10 = 7x - 7

y= 7x +3

G

100

What is the principal (positive) square root of 81?

9

200

In a right triangle, a and b are the lengths of the legs and c is the length of the hypotenuse. If a=12 inches and b=5 inches, what is c?

13

300

Write answer in Scientific Notation

(1.2 * 10¹¹)(8.5 * 10^-4)

1.02 * 10⁸

400

What is 0.0724 written in Scientific Notation?

7.24 x 10^-2

500

Write answer in Scientific Notation

(9.7 * 10⁸) - (9.77 * 10⁷)

8.723 * 10⁸

R

100

What's the y-intercept in y=3x-1

-1

200

A right triangle has an angle that measures 43 degrees. Find the missing angle.

47 degrees

300

Solve for x:

3x - (x-2) = 6x - 2

x=1

400

What is the solution to a system of equations?

All of the places that the 2 equations have in common or where they intersect.

500

Is (1, -2) a solution to the system of equations:

y = -5x + 3

y = x - 3

Yes.

A

100

What is the value of the expression 3x² - 1 when x=-1

2

200

What is the definition of slope?

Rise/Run or how steep the line is.

300

What is the rule for dividing exponents when the numbers have the same base?

take the exponent value in the numerator (the top exponent) and subtract the exponent value of the denominator (the bottom exponent). Keep the base!

400

Find the slope of the line that passes through (3, 3) and (8, 5)

2/5

500

Find the y intercept of the line 2x - 4y =12

y int: (0,-3)

D

100

All triangles should add up to what degree?

180 degrees

200

Express your answer as a single term using exponents

42⁵ * 42⁷ * 42^-1

41¹¹

300

How do you know if two shapes are ¨congruent?¨

Same shape and same size

400

What is the solution given the system of equations:

y = 2x - 2

y = 2(x-1) 

Infinite solutions

E

100

How do you find slope of two points?

Change in y divided by change in x OR graph and rise divided by run

200

Solve for y:

2(y-2) = 3x +2

y = 3x/2 +3

300

Is (3,-4) a solution to the equation 3x - 4y = 25. Show work.

Yes. 

400

A 15 foot ladder is leaned up against a house. If the base of the ladder has to be placed 6 feet from the base of the house, how high up the house can the ladder reach? Round to the tenths place.

13.7 feet