Unit 1
Multiplying two negatives or two positives make a product ____________.
Multiplying a negative and a positive makes a product ______________.
positive
negative
Write an expression that is equivalent to 4(x+3)
4x + 12
What is the form for an equation that shows a proportional relationship?
y=kx
Divide by 100
What is 3/10 as a decimal?
0.3
x=7
A graph has two points of (0, 0) and (3, 12). Write an equation for the proportionality of this line.
y=4x
What is 25% of 40?
$10
If the temperature drops from 19 degrees to -7 degrees, what is the change in temperature?
-26 degrees
Write an inequality that represents the statement: a number split into 4 equal parts is greater than or equal to 16
x/4 ≥ 16
Given the following table, is it proportional and if so, what is the value of k?
x y
1 4
2 8
3 12
4 15
It is not proportional
If you know that 25% of 40 is 10, how much would you pay if you bought a pair of jeans that are originally $40 if they are 25% off?
$30
1 7/12
Solve the equation for x: x/5-3 =15
x=90
Mark shoveled 1/8 ton of gravel in 1/4 hour. What was his average rate of shoveling in tons per hour?
1/2 tons per hour
What is 60% of 1,450?
870
If I start at 6 on a number line, then move to the left by 8, and then move back to the right by 20, what number should I end up on?
18
Maria is saving money to buy a new tablet that costs at least $250. She already has $40, and she plans to save $15 each week. Write an inequality that shows how many weeks, w, it will take Maria to have enough money to buy the tablet and solve for w.
15w+40 ≥ 250
w≥14
The charge for a ride in a taxi is proportional to the distance traveled. The cost for a 1/2-mile ride is $6.00. Which equation correctly relates x, the distance in miles, to y, the charge in dollars?
y=12x
The concert ticket was $60 last week, but the price increased by 25% this week. What is the new cost of the ticket?
$75