Mean, Median, and Mode
Find the mode: 2, 5, 2, 6, 5, 2, 3
2
1.2
10-2x4+5
7
What is 25% of 64?
16
Simplify: 4(x-6)
4x-24
find the median: 5, 2, 7, 3, 1
3
The mass of a jar of sugar is 1.9 kg. What is the total mass of 13 jars of sugar?
24.7 kg.
3-6x(9+2)
-63
What is 30% of 83?
24.9
Simplify: 9(6x-3)
54x-27
finding the mean of a data set is the same thing as finding the _______ of a data set.
average
Ellen wanted to buy the following items: A DVD player for $49.95, a DVD holder for $19.95, and a personal stereo for $21.95. Does Ellen have enough money to buy all three items if she has $90?
No
Kelly needs to do a math problem for her test: 3+(4x23)-2 Which step should kelly do first?
23
Timmy has to cut out 25% of a pie, but he doesn't understand percentages. He understands fractions, though. Help Timmy. Convert 25% into a fraction. What is the fraction?
1/4
Manny is having a party, and he wants to give 6 candies to each person that comes in. x number of adults comes in, and 5 children come in. How many candies does Manny give out? Simplify.
6x+30
counting the number of numbers in a data set, adding 1 to that sum, and then dividing by 2 is one way to find the _______
median
Melissa purchased $39.46 in groceries at a store. The cashier gave her $1.46 in change from a $50 bill. How much more change does the cashier still need to give Melissa?
$9.08
What is PEMDAS an acronym for?
Parenthesis, exponents, multiplication, division, addition, and subtraction
A T-shirt costs $50. You get 10% off in the sales. How much do you pay for the T-shirt?
$45
Ned is also having a party. He is giving out 5 brownies to every person that comes in. x number of children come in, and half as many adults come in. Write an equation describing how many brownies Ned will give out.
5(x+x/2)= number of brownies
Dr. Dre is a dentist. He needs to find out the mean of the number of cavities that his patients have. this is his data (each number is one person's number of cavities). 1,0,1,5,6,3,4 What is the mean of his data? (round up because you can't have a fraction of a cavity)
about 3
If a 10-foot piece of electrical tape has five pieces that are each 1.23 feet cut from it, what is the new length of the tape?
3.85 feet
how would you write the following question as an equation: Bob needs to cut 5 inches off of a 10 inch wood board, then nail on 2 more inches, and then do the same thing to 4 more boards. In all, how many inches of wood will Bob have?
(10-5+2)x5
Mary has 275 marbles. She wants to take 10% of them to the park. How many marbles should she take to the park? (round up)
28
There is an alien invasion. It takes 3 laser blasts to kill 1 alien. It takes twice as many laser blasts to destroy 1 spaceship. There are 11 aliens on the way, but you're not sure how many spaceships are on the way. Write an equation describing the total number of laser blasts it will take to kill all the aliens and spaceships.
3(11+2s)= number of laser blasts