7th Spiral Review A
The average temperature in Fairbanks, Alaska, was −4°F one day and 6°F the next day. Find the difference of the temperatures.
10F
Order the numbers from least to greatest.
8% 1/8 18% 8/18 0.8
A car moving at a constant speed travels 88 feet in 2 seconds. Use a proportion to find how many feet it travels in one minute.
2640 feet
A clock tower has a circular clock face with an area of 144π square feet. What is the diameter of the clock face?
24 feet
A circular mat has a circumference of 220 centimeters. Find the radius rounded to the nearest whole number.
35 cm
Carlin wants to determine the general attitude toward math of the students in the school. Which of the following methods will produce a random sample?
c) Survey every 15th student who enters the cafeteria at lunchtime.
A container has 14 yellow chips, 10 blue chips and 12 red chips in it. One chip is randomly chosen from the container, then a second chip is randomly chosen after replacing the first chip. What is the probability
that both chips are red?
1/9
The Suarez family spends 30% of their monthly income on the house payment. If the house payment is $1,200, what is the family’s income?
$4000
Mary wants to buy a bicycle that costs $280. Her parents agree to pay $100. Mary will save $20 a week. Write and solve an equation to find how long it will take her to save enough money.
100 + 20W = 280
9 weeks
Simplify: 2a −2/3b − 4 1/2a − 1/6b
-2 1/2a - 5/6b