Operations with Rational Numbers
What is the sign of a positive number times a negative number?
-
What is the constant of proportionality in the equation?
y = 13x
k = 13
What is the value of x in the equation below?
3x - 7 = 2
x = 3
What is the name of a line segment connecting a point on a circle to the center?
radius
What are the prime factors of 15?
3 and 5
What is the sign of a negative number times a negative number?
+
Solve for x:
x/3 = 5/6
x = 2.5
Combine like terms:
3x + 8 - 4x
8 - x
What is the formula for the circumference of a circle?
π * diameter
Could a triangle have side lengths 8, 3, and 4?
No
Evaluate -15 + 23?
8
What is the constant of proportionality in the table?
x y
1/4 1
2 8
3.5 14
k = 4
Write an expression that is equivalent to the expression below using the distributive property.
3(x - 7)
3x - 21
What is the formula for finding the area of a circle?
pi times radius squared
What is the least common multiple of 15 and 20?
60
Evaluate 5 - -8?
13
A train traveled 1/3 of the distance between 2 cities in 3/4 of an hour. At this rate, how long will it take the train to travel the entire distance between the two cities?
9/4 of an hour
How many faculty members at the Cooper Campus are alumni of Washington Latin?
5 (Osborne, Starnes, Fisher, Gans, Guthrie)
Pi is the ratio of what two measurements of a circle?
circumference and diameter
50
Evaluate 2/3 + 4/5
22/15
OR
1 7/15
Solve for x:
3/4 = 7/x
x = 28/3
OR
x = 9 1/3
Solve for x:
0.5(x + 2) = 11
x = 20
A circle has an area of 16π. What is its radius?
4
13 is what percent of 20?
65%