Rational Operations
Kayla is playing a game. She scored 5.5 points the first round, -2.7 points the next round, and -1.6 points in the next round. How many points did she end up with?
1.2 points
What is 40% of 230?
92
Simplify the expression:
-2x+5x
3x
Distribute:
2(-2x+5)
-4x+10
Solve:
2.5x=-37.5
x=-15
What does absolute value mean?
How far a number is from zero (always positive)
You are purchasing a T.V for $990 with a 9% sales tax. What is the final price of the T.V.?
$ 1,079.10
Simplify the expression:
7 - 8c + 3 - 6c
10-14c
Distribute:
−3(−8p+7)
24p−21
Solve: x/4=-8
-32
21 degrees
Marie purchased a $49.00 gift for a baby shower. She uses a coupon that offers 20% off. How much will Marie spend on the gift after the coupon?
$39.20
Evaluate the expression: (plug in)
2(a−5)+2
when a = 15
22
Distribute then combine like terms:
-6(-2b + 1) + 5b
17b - 6
Lucas wants to buy wood for a special project. Lowes charges $2 per foot and $5 for shipping. He spent $39 on this in total. How many feet of wood did he buy?
17 feet of wood
-15 - (-2.5)
-12.5
Valerie answered 28 problems on her test correctly. If Valerie correctly answered 80% of the problems on the test, then how many total problems were on the test?
35 problems
Simplify the expression:
5x + 3y - 5 + 4x + 3y + y + 8
9x + 7y + 3
Distribute then combine like terms:
3(3x - 10) + 2x + 40
11x + 10
−1=7−6n+8n
x=-14
A chemist is observing a solution’s temperature over a four-hour period that starts at -12.4°C. In the four hours, the temperature rises 5.7°C and drops 8.1°C. What is the temperature of the solution after four hours?
-14.8°C
Tickets to Disney World are $250.The price is going to increase on January 1. What is the percent of change if the cost increases to a $300?
Change/Original
50/250 = 20%
Evaluate the Expression: (plug in)
bc + 5a
when a = 3, b = 4, and c = -6
-9
Distribute then combine like terms:
-4a - 3(10a - 1)
-34a + 3
You sell bracelets for $4 each and make $52 after spending $12 on materials. How many did you sell?
16 bracelets