Math

How many integers are in the set (-81, -80, -79, ..., 3, 4)?

86

-18.6+29.7+(-14.3)+18.6+(-29.7)

-14.3

-(3-7)^3

64

If the set (-28, -27, -26, ..., x contains 54 integers, what is x?

25

Use divisiblity rules to determine if the number 64,243,377 is divisible by nine and eleven.

9-yes
11-yes

Use didvisibility rules to determine if the number 26,362,908 id divisible by 36. Show work or expain

36-yes
Since the numbers 4, 9, 3, 2, and 12 then it is divible by 36.

395 is what percent of 876?

45.09%

Scott really likes to drink water during the day. On Monday, he drank 2 gallons. One Tuesday, he drank 6 quarts. On Wednesday he drank 2 quarts and 4 pints. How many quarts did he drink over the course of the four days?

22 quarts

The mean of three test scores is 88 points. How many would be on the fourth if the new mean is 90 points?

4*90= 360
3*88= - 264
______
96 points
answer=96 points

94, 92, 74, 71. Wanted average 85. What is the fifth number?

5*85= 425
- 331
______
94
__________
/ Answer=94\
\__________/

The average of 10 students' test scores was 69%. Three students scored an 80%, 60%, and 40% respectively. Three students scored a 90% and two students scored 50%. The other two students received the same score. What were the two scores?

80+60+40+90+90+90+50+50= 550
69(10)=690
690-550=140
140/2=70
__________
|70%, 70%|
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The sum of two negative numbers is a negative number.

Always

[6 0 ] [-3 2 ]
[1 -3] * [-4 -1]

[-18 12]
[ 9 5]

What is the distance between -11 and 12?

23

A Both B
{1, 2, 3{4, 5}6, 7} 10, 8

a.)Just in A?
b.)Not in B?
c.)A intersect B?
d.)A U B

a.) {1, 2, 3, 4, 5}
b.) {1, 2, 3, 8, 10}
c.) {4, 5}
d.) {1, 2, 3, 4, 5, 6, 7}

0!

Always equals 1

Combination

Order doesn't matter

Permutation

Order does matter