Algebra
Which one below is an expression?
A) x+3
B) 5-y
C) 2x-3=13
D) 3/4x
C)
1/2 +5/10=
5/10+5/10=
10/10=1
What number is the outlier in the set of data?
6,8,4,2,8,13,33A)2
B)8
C)13
D)33
D)33
A spinner is divided into 4 equal sections: Red, Blue, Green, and Yellow. What is the probability of the spinner landing on Blue?
1/4
What is 2% as a decimal?
a. 0.02
b. 2.0
c. 0.2
d. 200
A
Maya wants to buy a pair of sneakers that costs $90. She already has $30 saved up. If she saves $10 each week from her allowance, write and solve a linear equation to find how many weeks (w) it will take her to save enough money.
10w+30=90
10w=90-30
10w=60
W=60/10
W=6 It will take 6 weeks to raise enough money
2/3+1/4
2/3+1/4=
8/12+3/12=
11/12
What is the mode of the set of data?
17,14,6,14,12,10,15,14,23,12
14
A drawer contains 4 black socks, 6 white socks, and 2 blue socks. If you reach in and pull out one sock without looking, what is the probability that you choose a white sock?
6/12=1/2
Nick save?
a. $178.20
b. $46.20
c. $97.00
d. $85.80
B
X/4=6
X=24
Liam is packing his backpack for school. His math textbook weighs 1 1/2 pounds and his science textbook weighs 1 3/4 pounds. What is the total weight of both textbooks combined? Express your answer as a mixed number in lowest terms.
What is the range of the set of data?
23, 22,19,8,45,39,67,14,3,7
64
You roll a standard six-sided die (numbered 1 to 6). What is the probability of rolling a number greater than 2? Express your answer as a fraction simplified to its lowest terms.
4/6=2/3
Jane’s lunch bill at a restaurant was $48.00, tax included. She decided to leave a 9% tip.
a) Calculate how much she left for a tip.
b) Calculate the total cost of her lunch.
A)$4.32
B)$52.32
Y/3+5=11
y/3=11-5
Y/3=6Y=6x3
Y=18
4 1/2 + 6 3/5
4+6=10
1/2 + 3/5 =
5/10+ 6/10=11/10=1 1/10
10 + 1 1/19
11 1/10
A group of 7 friends compared how many pieces of popcorn they could catch in their mouths. Their scores were:
15, 8, 22, 11, 15, 5, 23
Find the mean, median, and mode of this data set.
Mean:14.1
Median:15
Mode:15
A spinner with red, white, green and a regular dice numbered 1-6, how many possible outcomes are there?
1/3 x 1/6=
1/18
Of the 8500 Grade 7 students in the Western Region, 80% will register in an organized summer sports
program. How many students will register?
a. 680
b. 10625
c. 6800
d. 80
C)6800
8500 x.80
Your school is organizing a field trip to an amusement park. The bus rental company charges a flat fee of $150 for the day, plus $12 per student for the entry ticket. If the total bill came to $450, write a linear equation to represent this situation and solve it to find how many students went on the trip.
12s+150=450
12s=450-150
12s=300
s=300/12s=25
25 students went on the trip
Ava has completed 36 lengths of her swimming competition. This is 3/4 of the competition. How many lengths does she have left to finish the competition?
1/4 x 36 =9
John receives the following marks on 4 math tests: 75, 85, 83, 90.
What mark would he have to get on the next test to have a mean of 86 for the 5 tests?
97
At a school carnival, you pay $5 to play a game.
If 60 students play the game, use probability to predict exactly how many students will win the grand prize.
P red(1/3) x P heads(1/2)=1/6
There is a 1/6 of winning
Therefore, out of 60 students we calculate
60x1/6=10
10 students are predicted to win the grand prize
Last year, a local middle school had 420 students. This year, the school's enrollment increased by 5%.
What is the total number of students enrolled this year?
420x.05=21
420 + 21=441
441 students enrolled this year