873Rainer+D

-**__Mean__** is the average of the set of data. Add all the numbers and divide the total by the total pieces of data. Ex. 1,2,3,4,5 --> 1+2+3+4+5=15 --> 15/5=__**3**__ -**__Median__** is the middle number. You must have a numerical order to find the middle. Ex. 5,2,4,2,3 --> -If there is an even amount of numbers, simply add the 2 middle numbers and divide it by 2 to find the average. Ex. 2,6,8,3,5,2 --> --> 3+5=8 --> 8/2=4 -**__Mode__** is the number that shows up the most in a set of numbers. Ex. 2,**__4__**,**__4__**,5,6

1. Find the mean, median and mode for the following set of numbers: 9,5,4,4,6.

873RDanswer

mean-5.6 median-5 mode-4

-__**Square Root**__ is one of the factor of a number when multiplied to itself gives you the number. Ex. -__**Perfect Square**__ is any number that has the same length on all sides and has no decimals. Ex. -To find the square root of a number using fractions, first find the perfect square on both side of your number. Ex. 14 --> The square root of the smaller perfect square is your whole number. Ex. 9 --> To find the numerator, count the number after the smaller perfect square to your number. The number you get is the numerator. Ex. --> __**5 numbers**__ Count the numbers after the smaller perfect square to the larger perfect square. The number you get is your denominator. Ex. --> __**7 numbers**__ Answer. Square root of 14 is __**3 5/7**__

2. Determine the square root of 38 without using a calculator.

873RDanswer

square root-6 2/13

-__**Percent**__ is an equivalent fraction out of a hundred. Ex. 10/100=__**10%**__ -To find a certain percent of a given number, first find 1% of that number. Divide your number by 100 to find 1%. Ex. 50/100=__**0.5=1% of 50**__ -Now multiply the 1% to the percent you are looking for. Ex. 0.5x30%=__**15=30% of 50**__

3. Is taking 10% off a given item and then an additional 10% off the reduced price the same as taking 20% off the original price? Why or why not?

873RDanswer

a.$100-10=$90-9=$81 b.$100-20=$80 answer-not the same

-To solve a ratio proportion question using __**fractions**__, first make a word ratio. This makes it easier to put the numbers like a fraction. Ex. If 5 bikes has 10 tires, how much tires are there in 10 bikes? The word ratio would be. It could also be Bikes/Tires. -Now put your numbers as an equivalent fractions. Ex. Since bike is your denominator, put __**5**__ and __**10**__ as a **__denominator__**,. Put your last number as the numerator in the first fraction,. -To find the missing number, Divide the second denominator by the first denominator. Multiply the answer by the numerator. Ex.

4. If 10 cars has 40 tires, how much tires are in 50 cars? Solve this question using fractions.

873RDanswer

tires/cars = 40/10 = 200/50

-To solve this ratio proportion question using __**ratio tables**__, first make a word ratio. This would make it easier to put the numbers in the table. Ex. If 5 bikes has 10 tires, how much tires are there in 10 bikes? The word ratio would be. -Now put your numbers in the table. Remember that the equivalent numbers go in the opposite of each other. Ex. Since 5 bikes has 10 tires, put 5 in the bikes and 10 in the tires. Also put your last number where it should go,. -Now divide the the second number in the first column by the the first number. Multiply the answer by the number in the second column. Ex.

5. If 10 basket of fruit cost $25, how much does 60 baskets cost? Solve this question using ratio tables

873RDanswer

$25x6=$150