8th Grade
Math
Math
Miss G. Worked from 4:30 am to 9:00 am. How many hours did Miss G. Work?
4 hours 30 minutes
What do you call a shape that is 2x the original size?
dilation
What's the y-intercept in y=3x-1
-1
What is the value of the expression 3x2-1 when x=-1
2
All triangles should add up to what degree?
180 degrees
Given the system of equations:
y = 2x - 2
y = 2(x-1)
What is the solution?
Infinite solutions
Solve for x:
x/5 + 2/3 = 1
Express answer as a fraction.
5/3
Solve: -2(x-2) = 3x-6
x=2
Reduce 15/25
3/5
Solve for x:
3x - 4y = 12
3x = 4y +12
x = 4x/3 + 4
Evaluate:
72 - 3(4-3) +10.3
76
Solve for y:
2(y-2) = 3x +2
y = 3x/2 +3
1/2 of 16=
8
Distribute and simplify:
1-x(2-3)
1-2x+3x
1+x
Solve for x:
3x- (x-2 ) = 6x - 2
x=1
Write this number in scientific notation: 4,560,000,000,000,000
4.56 X 10 to the 15th power
Find the difference: 4,589-2,588
2,001
What is the square root of 81?
9
Do the following lengths make sides of a triangle? If yes, what kind?
a = 2, b = 6, c = 10
No
Which is greater? 2/9 or 0.23
0.23 (because 2/9 = 0.22222222222....)
Round 85.5 to the nearest whole number
90
What is the mean, median, mode, and range of this data set?
10, 10, 10, 4, 7, 8, 9, 3, 2, 2, 6, 1
mean is 6, mode is 10, and median is 6.5, range is 9
Use <,>,or = to compare:
1/2 ___ 8/16
=
Do the following lengths make sides of a triangle? If yes, what kind?
a = 6, b = 8, c = 11
Yes, obtuse.
Convert into y=mx+b form.
2x + y -10 = 9x - 7
y= 7x +3
Is (3,-4) a solution to the equation 3x - 4y = 25. Show work.
Yes
Is (1, -2) a solution to the system of equations:
y = -5x + 3
y = x - 3
Show work.
Yes.
Find the x and y intercepts of the line 2x - 4y =12
x int: (6,0)
y int: (0,-3)
Solve for x:
2x - x/3 = 5
x = 3
Solve the proportion:
x/12 = 2/3
x = 8