Multi-step equations
3(2x-4)=0
Distribute the 3
or
Divide by 3 on both sides
2x-230<-1230
x<-500
What are the 2 characteristics of a representative sample?
Random and everyone should have the same probability of being chosen.
Students in a math class will randomly be assigned a shape for a class project. The only types of shapes that will be assigned are rectangles, hexagon, nonagon, triangles, and squares. What is the probability that a student will be assigned a hexagon?
1/5
Can the side lengths of 3cm, 4cm, and 6cm for a triangle? EXPLAIN
YHes, because 3+4>6
Solve
3(2x-4)=0
x=2
x>= 5 can be described on a graph in the following manner
closed circle at 5 going to the right.
The manager of a mall wanted to collect information about the ages of people shopping at the new stores. The manager surveyed 100 randomly selected people who were shopping on one of the days. The table shows the results of the survey.
Age Number of People
Younger Than 30 Years Old:55 people
30 Years Old or Older: 45 people
Based on the results of the survey, how many of the 635 people who were shopping that day would be expected to be younger than 30 years old? (Round your answer to the nearest whole)
about 349 people
What is the probability of rolling an odd number on a 6-sided dice? (Simplify the fraction)
1/2
A triangle is made up with side lengths 2cm and 3cm, what is a possible value for the 3rd side?
The 2 smallest sides must be larger than the bigger side.
A family buys 4 airline tickets online. The family buys travel insurance that costs $16 per ticket. The total cost is $752. Let x represent the price of one ticket. Write an equation for the total cost.
4(x+16)=752
4x+64=752
On a road trip, a family drives 350 miles per day. How many days, d, must they travel to reach a distance of at least 1,400 miles?
Write the inequality
350d>=1400
Compare the 2 means using a complete sentence.
Problem on board (Review #8)
Daniel Mean:16
Sam Mean:12
So Daniel on average scored 4 more points than Sam.
Five boys and seven girls enter a contest at School #6. A randomly chosen winner will be awarded a homework pass, an ice cream, or a teddy bear. What is the probability that a girl will win a homework pass?
7/36
On scale drawing, a helicopter is 7.6 inches long. The scale on the drawing shows a ratio of 1 inch to 10 feet. What is the actual length of the helicopter, in feet?
76 feet
4(0.5x-3.6)=-9.4
x=2.5
Raymi has $950 in the bank. He is saving for a trip. He has 10 weeks before he leaves. The total cost of his trip is $1,500. How much money does he need to save each week to have at least enough money to pay for the trip?
x>=55
There are 350 freshman students at FJC. The guidance counselor conducted a survey among a random sample of 25 freshman to find what their favorite classes were. He recorded the data in the table below. Which statement BEST describes the data? (Chart from #11)
A. No freshman students like English best.
B. Exactly 20% of the freshman students like math best.
C. Fewer freshman students have no favorite class than students who like social studies best.
D. Fewer freshman students have multiple favorite classes than students who like science best.
D
What is the probability of rolling a 7 on a standard 6-sided dice?
Impossible or 0
How many triangles can be formed with angle measures 90, 30, 50?
None because they do not add to 180 degrees.
4x + 8 = 24
3(y + 2) = 36
Solve for both x and y
x= 4
y=10
Leticia has $23 to spend at a grocery store. She is going to buy bags of vegetables that cost $5.75 each and one box of cookies that cost $3.50. Write and solve an inequality that models this situation and could be used to determine the maximum number of vegetables, v, Leticia can buy.
5.75v+3.5<=23
v<=3.39
so she can buy 3 vegetables
Jonathan wants to survey school 6 to determine their favorite color. Describe a way he could get a representative sample of the school.
Answers may vary
A standard number cube, numbered 1 through 6 on each side, is rolled 5 times. What is the probability of rolling a 4 on all five rolls?
1/7776
What shape has exactly 1 pair of parallel lines and is a quadrilateral?
Trapezoid