Number Systems
What is the value of –2.3 + (–3.65) – 1.3?
–7.25
Marty rolls a die 10 times and has the following outcomes:
Roll 1: 1 time
Roll 2: 4 times
Roll 3: 1 time
Roll 4: 2 times
Roll 5: 2 times
Roll 6: 0 times
According to his results, what was his experimental probability of rolling a number greater than 3?
4/10
OR
2/5
Simplify the expression –8(3+9) – 6v
–96 – 6v
Jordan a coupon for 15% off the total bill at a restaurant. His original bill was $38.00. After the discount, what amount is his bill?
$32.30
A car is 12.8 feet long. Jess uses a scale of 1in: 2ft to make a model of the car. How long is her model?
6.4 in.
What is the value of –26 x 9?
–234
In a cafeteria, there are 7 teachers, 48 girls, and 45 boys. What is the probability that a person chosen at random from the cafeteria is a boy? (simplify your answer)
9/20
Simplify the expression 2/8(2/6c – 5/8)
4/48C – 10/64
OR
1/12C – 5/32
Dan borrowed money to buy a sound system that costs $350. He is charged 5% simple interest for one year. What is the total amount he pays for the sound system if he pays the full amount in one year?
$367.50
The scale used to make a scale model of a volcano is 5cm: 250m. The height of the actual volcano is about 1,325 meters. How tall is the model?
A) 26.5 cm
B) 265 cm
C) 5.3 cm
A) 26.5 cm
A sugar-water solution freezes at –1.8℃. A salt-water solution freezes at –13.6℃. What is the absolute value difference between the freezing temperatures of the solutions?
11.8
Bailey is going to roll one number cube, numbered 1-6, 30 times. Approximately how many times should she roll a 1?
5
Gabrielle sells computers and tablets. She earns an 8% commission on every dollar of sales that she makes. In one month she earned $2,560 in commissions. Which equation and answer for Gabrielle’s sales, s, in dollars for that month is correct?
A) 0.08s = 2560; s = 32,000
B) 0.08(2560); s = 204.80
C) 1.08s = 2,560; s = 2,370.37
D) 1.08(2,560) = s; s = 2,764.80
A) 0.08s = 2560; s = 32,000
A customer pays $18 for a DVD that originally cost $20. What is the percent decrease in the cost of the DVD?
A) 2%
B) 10%
C) 11%
D) 18%
B) 10%
A scale drawing of a soccer field has a length of 8 inches and a width of 5 inches. A length of 1 inch in the drawing corresponds to 15 yards in the actual field. Find the dimensions and the area of the actual field.
W = 75 yd
A = 9,000 yd2
A whale dives at a speed of 3 feet per second. What is the change in the position of the whale relative to where it started after 12 seconds?
A) –36 feet
B) –4 feet
C) 4 feet
D) 36 feet
A) –36 feet
A program generates 4 numbers from 1 to 5. What is the probability that the number 4 will be generated all four times?
A) 1/5
B) 1/4
C) 1/20
D) 1/625
D) 1/625
–4 + y + 3(2 + 3y)
10y + 2
16 is what percent of 80?
20%
Find the height of a parallelogram with an area of 1,220 square yards and a base of 20 yards?
61 yards
–28 / 2.8(5)
–2
A coach collected data for the same group of runners for two weeks. The mean distance run for Week 1 was 14.5 miles, with a MAD of 1.15. The mean distance for Week 2 was 16 miles, with a MAD of 1.5. Which statement is true about the comparison of the data.
A) The Week 2 data values tend to be closer to their mean than the Week 1 data values are to their mean because Week 2 has a greater MAD.
B) The Week 2 data values tend to be closer to their mean than the Week 1 data values are to their mean because Week 2 has a lower MAD.
C) The Week 2 data values tend to farther from their mean than the Week 1 data values are to their mean because Week 2 has a greater MAD.
D) The Week 2 data values tend to farther from their mean than the Week 1 data values are to their mean because Week 2 has a lower MAD.
C) The Week 2 data values tend to farther from their mean than the Week 1 data values are to their mean because Week 2 has a greater MAD.
19 + x/2 = 4
–30
Patricia has $48,100 in a savings account that earns 15% annually. How much will she have in 2 years?
A) $7250
B) $14,430
C) $3000
D) $96,200
B) $14,430
Julio wants to paint his bedroom. One gallon of paint will cover about 300 square feet of surface. His 4 walls are 12 feet long and 8 feet tall. If he has one gallon of paint, does he have enough to paint one coat? Explain.
No, the four walls total 384 ft2