Lafayette 8th grade Math

8th Grade Math 1

100

Mr G. Worked from 6:30 am to 5:00 pm. How many hours did Mr G. Work?

10 hours 30 minutes

200

Solve for x:

x/5 + 4 = 1

Express answer as a fraction.

-15

300

1/2 of 16=

8

400

What is a triangle called with angles 20^o, 40^o, 120^o?

Obtuse

500

Convert into y=mx+b form.

2x + y -10 = 9x - 7

y= 7x +3

8th Grade Math 2

100

What transformation is done if an image is 2x the original size?

dilation 

200

Solve: -2(x-2)  = 3x-6

x=2

300

Distribute and simplify:

1-x(2-3)

1-2x+3x

1+x

400

What is 81 x 54?

4,374

500

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

Yes

8th Grade Math 3

100

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

-1

200

Simplify the fraction 15/25

3/5

300

Solve for x:

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

x=1

400

Round 85.5 to the nearest whole number

90

500

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

y = -5x + 3

y = x - 3

Show work.

Yes.

8th Grade Math 4

100

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

2

200

Solve for x:

3x - 4y = 12

3x = 4y +12

x = 4x/3 + 4

300

What is 210 divided by 5?

42

400

What is the 8,529 divided by 3?

2,843

500

Find the x and y intercepts of the line 2x - 4y =12

x int: (6,0)

y int: (0,-3)

8th Grade Math 5

100

What is the sum of the angles of a triangle?

180 degrees

200

Evaluate:

7² - 3(4-3) +10.3

76

300

Find the difference: 4,589-2,588

2,001

400

Use <,>,or = to compare:

1/2 ___ 8/16

=

500

Solve for x: 

2x - x/3 = 5

x = 3

8th Grade Math 6

100

Given the system of equations:

y = 2x - 2

y = 2(x-1) 

What is the solution?

Infinite solutions

200

Solve for y:

2(y-2) = 3x +2

y = 3x/2 +3

300

What is the square root of 81?

9

400

If the translation rule (x, y)--> (x+4, y-4) is applied to the point (8, -4), where would the image be?

(12, -8)

500

Solve the proportion:

x/12 = 2/3

x = 8