Unit Rates/Constant of Proportionality
An online music store sells songs on its website. Each song is the SAME price. The cost to purchase 8 songs is $10. Create an equation to represent the relationship between the total cost, c, and number of songs, s, purchased.
c = 1.25s
Which expression is equivalent to 8.2 - 11.34?
a. -8.2 + 11.34
b. 8.2 + (-11.34)
c. 11.34 - 8.2
d. -8.2 + (-11.34)
b. 8.2 + (-11.34)
The circumference of a circle is 50.24. What is the radius of the circle? HINT: r= circumference/ 2(3.14).
8
What is the mean weight?
10.79
An online music store sells songs on its website. Each song is the SAME price. If each song costs $1.25, how many songs can be purchased with $25?
20 songs
Which expression is equivalent to -7?
a. 2-5
b. -2 - 5
c. 2 - (-5)
d. -2 - (-5)
b. -2 - 5
Select the TWO expressions that are equivalent to
4(1/8x -1) - 1/2 (2/3x -6)
1/2x - 4 - 1/3x + 3
1/6x - 1
What is the area of Leslie's bedroom?
72
The 25 students in Jayson’s class have a choice of THREE extracurricular activities. Of the total number of students 8 choose soccer, 6 choose math club, and the rest choose chorus. What is the probability that Jayson chooses chorus?
11/25
Paige fills a large bucket with water. She fills it with 3/8 gallon of water in 1/4 minute. What is Paige's unit rate for filling the bucket, in gallons per minute.
1.5 gallons per minute or 12/8 gallons per minute
What is the product of -1 and -8?
8
Create an expression equivalent to
4(2x -1) + 3(1/2x +5)
WITHOUT the use of parentheses
8x -4 + 3/2x + 15
9.5x + 11
What is the value of x?
44.3
Kara’s teacher has 20 students. She splits them into 4 equally sized groups: red group, yellow group, green group and blue group. What is the probability that Kara will be in the yellow group?
1/4
A graph has a proportional relationship. The pretty point is at the point (4,8). What is the Constant of Proportionality?
2
The temperature in Perrysburg Ohio was -6. The temperature in Perrysburg is 6 degrees WARMER. What is the temperature today?
0 degrees
George has saved $264 but now needs $1800 for a down payment on a car. George works 32 hours every week and earns $16 per hour. He will deposit HALF of his weekly check into his bank account each week. Complete the equation that George can use to find after how many weeks, w, he will have $1800 in his bank account.
_______ + ________ w = 1800
264 + 8w = 1800
The radius of a circle is 20 cm. What is the circumference?
125.6
A six sided number cube with sides labeled 1-6 was rolled 50 times. What is a good prediction for the number of times a 5 will be rolled?
8 times
Create an equation to show the relationship between m and g.
m=32g
What is the value of 2/3(-9+3)
-4
Solve the inequality and list THREE possible outcomes for x.
4x + 2 < 22
x <5
Write an expression that would show the area of a circle with a radius of 7
3.14 * 7 * 7
If Mary has seven daughters, and each has a brother, how many kids does Mary have?
8- 7 daughters and 1 son