Chapter 1
What is the absolute value of −8?
8
Simplify: 3.5+2.1
5.6
Simplify: 3x+4x
7x
Write an inequality: "The sum of a number and 4 is less than 10."
x + 4 < 10
Write the ratio of 6 cats to 9 dogs in simplest form.
2:3
Add: −7+4
-3
Simplify: 5:6 - 1:3
1:2
Evaluate: 5x−2 when x=−3
-17
Solve: x−5≥−2x - 5
x ≥ 3
Solve: 5:8=x:16
x=10
subtract: −3−(−9)
-6
7:8 of 2:3
7:12
Write the phrase as an expression: "The sum of three times a number and 7."
3x+7
Solve: −3x>12
x < -4
Is 12:16 proportional to 3:4?
yes
Multiply: -5(4)
-20
divide: -6.4 / 0.8
-8
Solve: 2x+5=13
x=4
Write a real-world example of an inequality that could represent a budget constraint
Answers vary; e.g., "You can spend at most $50."
A car travels 180 miles in 3 hours. How far can it travel in 7 hours?
420 miles
A submarine is at a depth of −120-120−120 feet. It rises 15 feet, then descends 25 feet, and finally rises 10 feet. What is its final depth?
-120
Sorry, I am not allowed to type in math...
Solve: 5:6/(-2):(3) + 1:4
-1
Solve: 3(x−4)−2(x+3)=7
x=25
Solve and graph: −2(x−3)≤4x+8
x≥−(1/3) graph includes a closed circle at −(1/3) with an arrow to the right
A recipe calls for 3 cups of sugar to make 8 dozen cookies. How many cups of sugar are needed to make 15 dozen cookies?
x=5.625, or 5 5/8 cups