Inequalities
Solve the inequality and graph.
2n>20
n>10 (check graph for correct)
Write and solve a proportion to answer the question:
14 is what percent of 56?
p=25
Explain the difference of Mean and M.A.D.
Check student answers.
Find the unit rate:
297 words in 5.5 minutes
54 wpm
The probability of an event is a number that represents the _____________ that the event will occur.
Likelihood
Solve and graph inequality.
7<3.5k
k>2 (check graph)
25% of what number is 9?
w=36
Check student answers.
Tell whether the rates form a proportion:
7 inches in 9 hours;
42 inches in 54 hours
yes
What is the theoretical probability of randomly choosing an X from the word "EXPLORE"? (round to the nearest tenth)
1/7 = 14.3%
You have $5.60 to buy avocados for a guacamole recipe. Avacados are $1.40 each. Write and solve an inequality that represents the numbers of avocados you can buy.
1.40<= 5.60 (x is less than or equal to four)
What number is 25% of 7/8?
a=7/32
You want to estimate the number of students in your school whose favorite subject is earth science. You survey the first 10 students who walk into Mrs. Molina's room. Determine whether the sample is biased or unbiased.
biased - not random
You do 90 sit-ups in 2 minutes. Your friend does 126 sit-ups in 2.8 minutes. Do these rates form a proportion?
Yes; you each can do 45 situps per minutes.
Use the handout, #3, to find the probability of the compound event:
not spinning a 5 and flipping heads on a coin2/5 = 40%
Write the word sentence as an inequality:
"Six times a number w is at least -24."
6w>=-24
Identify the percent of increase or decrease:
68 miles to 42.5 miles
decrease; 37.5%
Look at the handout --
You have a 50% chance of selecting a blue marble from Bag A and a 20% chance of selecting a blue marble from Bag B. Use the handout to answer the question, "What is the estimated probability (in a percent) of selecting a blue marble from both bags?"
12%
Tell whether the rates are equivalent:
7.5 miles for every 3/4 hour
1/2 mile for every 3 minutes
yes; both are at the same rate of 10 mi/hr
Describe a compound event that has a probability between 50% and 80%.
check student's answer
Solve the inequality:
-2.4>b/-2.5
b>6
You deposit $800 in an account. The account earns $360 simple interest in 3 years. What is the annual interest rate?
15%
Use the box and whisker hand out. The double box-and-whisker plot represents the points scored per game by two football teams during the regular season. Compare the data sets using measures of center and variation.
IQR's are the same, Team B has a great media.
You earn $56 walking your neighbor's dog for 8 hours. Your friend earns $36 painting your neighbor's fence for 4 hours. Are the pay rates equivalent? Explain.
no, your friend earns more money per hour.
Use a tree diagram, or the fundamental counting principle to find how many different home theater systems you can make from 6 DVD players, 8 TVs, and 3 brands of speakers.
144 home theater systems