Add/Subtract Rational Numbers
-15 + 18
3
6(-13)
-78
9x - 5x + 2x - 8x
-2x
12 + 4x = 32
x = 5
2x + 10 > 24
x > 7
13.5 - (-4.3)
17.8
-0.4(-0.8)
0.32
6.4x + 1.2 - 5.6x - 3.4
0.8x - 2.2
20x - 15 = 25
x = 2
x > 9
1/2 - 3/4
-1/4 or -0.25
-169/13
-13
4(2x - 6)
9(x + 3) = 45
x = 2
3x - 13 < 8
What kind of circle would you have?
Which direction would you shade?
Open circle
Shade left
-11 + 18 - 5
2
-64/-8
8
1/2 (x + 4) - 2
1/2x
A plumber charges a $35 fee plus $25 per hour. If the total cost is $135, then how many hours did the plumber work?
4 hours
A submarine descended 14 meters. Then it descended another 7 meters. How many meters does the submarine need to ascend to go back to the surface?
21 meters
Write
5/8
as a decimal
0.625
The side lengths of a triangle are 3x, 5x + 6, and 2x - 7. What is the perimeter of the triangle?
10x - 1
Sam wants to buy new carpet for his living room. The living room is in the shape of a rectangle. The width of the living room is 13 feet. The length of the living room is longer by x feet. Write an equation to find the area of the living room.
13(13 + x)