Expressions
−6k + 7k
k or 1k
4x + 6 = 10
x = 1
Solve for w:
w = 3
6 2
w = 9
A 5-pound bag of oranges is on sale for $4.50. What is the price per pound?
0.90 cents per pound
Give an example of an additive inverse
(real life or numbers)
Various Examples
12r − 8 − 12
12r − 20
c + 5 = 15
c = 10
What is 25% of 56?
14
A car can travel a distance of 8.4 feet in 2.8 seconds. What is the average speed of the car?
3 feet per second
What is 5/6 as a decimal?
0.833 repeating
n − 10 + 9n − 3
10n − 13
7 + 4b = 34
b = 7
Tara answered 19 out of 25 questions correctly on her math test.
What percentage did she answer correctly?
76%
Mrs. Olsen makes 25% commission on every couch she sells. She sold $3,634 worth of couches in January.
How much is her commission?
$908.50
Two things make a graph PROPORTIONAL
What are they?
1. start at the origin (0,0)
2. straight line
−2x + 11 + 6x
4x + 11
2 + 4c = 18
c = 4
Mr. Foraker spent $82 on lunch. He wants to leave a 20% tip.
How much is his TIP??
$16.40
How many cups of SUGAR are needed for each cup of BUTTER? (watch the order of the question)
2 cups of sugar for 1 cup of butter
In the equation y=kx
What does the "k" stand for?
n + 4 − 9 − 5n
−4n − 5
10x = 30
x = 3
We are having a milkshake party!
The recipe for milk hakes requires 5 bottles of milk to serve 35 people. I invited 105 people! How many bottles of milk will I need to make milkshakes for 105 people?
15 bottles
I want to buy a new handbag. The regular price of the handbag is $259.95. It is on SALE for 20% off.
What is the sale price of the handbag?
$51.99 discount
$207.96 SALE PRICE (answer)
She drove 25 miles in a 1/2 hour.
What is her average rate of speed in MILES per HOUR?
50 miles per 1 hour