Topic 3
Yuni loned $400 to her brother. He will repay the loan by paying 2.5% simple interest for 3 years. How much will he pay in interest?
He will pay $30 in interest
A farmer charges $1.75 for each pound of strawberries picked and $2 for a basket to hold the strawberries. What is the total cost to pick 5 pounds of strawberries?
$10.75
The perimeter of a square is represented with the expression 84+44s. What is the length of one side of the square.
The length of one side is 21+11s
9 less than the product of 6 and x is greater than 54.
x> 10 1/2
Luke rolls a 10-sided solid with equal-sized faces labeled 1 to 10. What is the probability of rolling a 4.
1 out of 10, or 1/10
It is unikely to occur.
Amy buys a Stanley for $45. She has to pay 5% sales tax. How much does she spend on Stanley in total.
$47.25
-7+ 1/3n - 4/3 +2n
2 1/3n - 8 1/3
There are red and yellow flowers in a city park. The number of yellow flowers is 3 more than 1/3 of the number of red flowers. Write an equation to find the number of red flowers. Let r represent the number of red flowers. Then solve for r.
The garden had 54 red flowers.
Solve the inequality 7(x+8) - 4 < 143
x < 13
The numbers from 1 to 5 are written on slips of paper and placed in a bucket. What is the theoretical probability of drawing a 2?
P(2) = number of slips labeled 2
Number of possible outcomes = 1/5
Gerald buys retinal serum for $85. There is a sale for 20% off. How much does Gerald pay for the retinal.
$68
expand the equation
1/4(h=7)
(1/4 x h) + (1/4 x 7) = 1/4h + 1.75
Solve the equation 2(4.3 + n) =17.63
n=4.515
Describe the sample and the population
honey bee florist customer survey: favorite flowers
Rose daisy tulip
15 9 16
Sample: 40 customers of honey bee florist
Population: all honey bee florist customers
Four people conduct an experiment to find how often a flipped coin lands heads up. The results are shown in the table below.
name total flips heads
Ashley 55 26
Brent 70 38
Carey 50 22
David 80 41
total 255
Based on the results from each persons coin flips, find the experimental probability of a flipped coin landing heads up.
How does the experimental probability compare to the theoretical probability of a flipped coin landing up.
The flipped coin landed heads up in 177 of its 255 trials. The experimental probability is about 49.8%
The experimental probability, 49.8%, is very close to the theoretical probability of 50%
Simone buys a bottle of perfume for $25. She sells it for $40. What is the percent markup?
60%
Factor the expresssion
12x - 9y + 15
3(4x-3y+5)
Solve x + 13 >_ 43
x >_ 30
There are 400 students at polly's school. She surveyed a random sample of 80 students to find their favorite hobby.
19 said they like to read 30 said they like to be with friends 8 said they like to do crafts 23 said they like to play sports.
Make an inference from this data.
Doing crafts is the least popular hobby at polly's school.
Jenna spins the pointer on her spinner 20 times. Develop a probability model for the situation. What is the sum of the probabilities in the probability model?
1
24+78%
42.72
Kerry has n markers. Rachel has 1 marker fewer than twice the number of markers Kerry has. Write and simplify an expression for the total number of markers they have.
3n - 1
Solve - 15n > 75
n < -5
The student shop sells red and black bags printed with the school logo. Students can choose a backpack, duffel bag, or cinch sack of either color. Make a tree diagram to show all the styles of bags sold at the shop.
backpack
red duffel bag
cinch sack
backpack
black duffel bag
cinch sack
the shop sells 6 different styles of bags.