Number Sense
1/4 - 1/2 =
-1/4
Rewrite the expression using the distributive property: 12x + 18
6(2x+3)
Ann works 20 hours and earns a total of $400. How much did she earn per hour
$20 /hr.
Can the following sides make a triangle:
2, 2, 5
no...4 is not greater than 5
What is the mean of the following numbers? 500, -320, 47, -16, -119, 622
119
The thermometer at the North Pole when Chris woke up this morning read -15 degrees. The temperature rose 20 degrees by noon. What was the temperature at noon?
5 degrees
Simplify:
-2(-x+5y)+3(2x-6y)
2x-10y+6x-18y
8x-28y
Sassy Jeans are $90 a pair. If they are 40% off today, how much will they cost?
$54
Can the following angles form a triangle:
15, 35, 130
yes, the sum = 180
Decide if the scenario is a valid random samples. Then tell why or why not:
Survey every 10th person leaving a Dallas Cowboys game to find out what is the most popular football team in the USA.
No, because the people are biased towards football.
Convert 4/5 to a decimal
0.80
Solve: -3x + 12 = 48
x = -12
If 5 people ate 30 grapes, how many people ate 426?
71 people
If there is a square pyramid, and it's cut perpendicular to the base, what shape is formed by the cross section?
triangle
In a survey of 100 people for what is their most favorite pet, 36 people chose cat, 55 chose dog, 9 fish. What percent of people chose cat?
36%
You have 9 math coins and each coin is worth -25 points. How many points is that all together?
-225
Rich bought 5 cupcakes and one pie. He knows his total bill was $22.64 and knows the pie was $6.89, but he wants to find the price of the cupcakes. Write an equation to determine the price of each cupcake.
5c + 6.89 = 22.64
How do I know if a graph shows a proportional relationship?
Straight line through the origin (0,0)
What is the area of a circle with a diameter of 10 cm?
78.5 cm2
A new school wants to find out what colors they should choose for their school colors. Which of the following samples would best represent the whole school population? A. Survey every tenth student as they leave Chorus practice. B. At football practice, survey every third player as they take a water break. C. Put all students’ names in a hat and survey the first 100 pulled from the hat.
C.
The numerical expression 1/4(8 - 1/2) is equal to:
15/8 or 1 7/8
Evaluate: -1.5x+120 > 270
x<-100
Ari borrowed $2000 and paid it back over 3 years. The simple interest rate was 2% annually.
How much interest did Ari pay over the three years?
$120
Find the volume of a rectangular prism with a width of 5 cm, a length of 3 cm, and a height of 7 cm.
105 cm3
Given the following set of data, what is the range? ( 2, 23, 34, 74, 21, 8, 9, 65)
74-2=72