Scale and Proportion
A classroom has a proportion of 15 girls to 5 boys. What is the unit rate?
3 to 1 or 3/1
17 + (-8) =
9
8 * (-12)
-96
2(x + 4)
2x + 8
terminating, because it equals 0.75, which ends at the 5
If Alex drives 90 miles every 4 hours, how far does he travel in 6 hours?
135 miles
-38 + (-24)
-62
-6 * (-7)
42
Simplify
3(6x - 7)
18x - 21
2(y + 6) = 28
y = ?
y = 8
What is 3/4 divided by 1/3?
9/4 or 2.25
-8 - (-2)
-6
-28/(-4)
7
Simplify:
3x - 7y + 4x + 7y
7x
If r = 4, what is the area of the circle? (use 3.14 for pi)
50.24
Target sells apples for $0.25 each. Write an equation to show the relationship between the number of apples, a, someone buys and the total cost, c.
c = 0.25a
|10 - (-6)| =
16
48/(-12)
-4
Simplify:
-3m + 5n - 4 + 10m - 10n + 6
7m - 5n + 2
x + 4x + 15 = 150
What is x?
x = 27
A farm stand sells oranges in 3 pound bags for $3.75. Write an equation that represents the cost, c, for p pounds of oranges.
c = 1.25p
Why does -7 - (-4) have the same result as -7 + 4?
Subtracting a negative is the same as adding a positive
3 * (-2) * (-4) * (-5)
-120
Simplify:
-4(2x - 7) + 2x - 6
-6x - 22
3/4(5x - 3) + 8 = 17
What is x?
x = 3