MATHEMATICS MIDDLE SCHOOL

Put a square number in each box to make these calculations correct.___+___=80 ___-___=33

___÷___=090

Can you help me ???

Answers

Answer 1
Answer: 16 + 64 = 33

49 - 16 = 33

810/9 = 90

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For what value of c is the relation a function: (2,8),(12,3), (c,4), (-1,8), (0,3)?

Answers

It seems to me c could be any number besides 2,12,-1 or 0

why?

a function is defined by each x value having a single y value

if an x value has two numbers such as (0,1) (0,2) than it is not a function.

the vertical line test is great for seeing if something is a function becasue it determines if each x value has one y value.

PLEASE ANSWER ASAP! IMPORTANT! MUST BE CORRECT! GIVING OUT POINTS!John stated that when you add an even and an odd integer the answer will be odd. Use these numbers to answer the questions: –13, –8, 16, 23, –7

Is John’s statement always true, sometimes true, or always false? Write two equations to support your answer.

Answers

so an even number is represented as 2n where n= a whole number
an odd is 1 more than an even so 2n+1 is odd

so even+odd=2n+2n+1=4n+1=
we see 2 2n's in there which are even
(even)+(even)+1
we know that even+even=even try that withe any 2 even numbers
then +1 means it's odd so therefor it is always true
Try adding some of these together to look for the pattern: 

-13 +16 = 3 odd+even = odd 

-7 + 16 = 9 

how about -13 + -7 = -20 

-8 + 16 = 8 

It looks like 

even + even = even 
odd + odd = even 

even + odd = odd 

So, we only get an odd result in this case. It seems that it is always true.

Find the minimum, maximum, range, mean, and median for the data set. 12, 13, 13, 17, 18, 19, 27

A.
minimum: 12
maximum: 27
range: 15
mean: 17
median: 13

B.
minimum: 27
maximum: 12
range: 15
mean: 17
median: 17

C.
minimum: 12
maximum: 27
range: 15
mean: 17
median: 17

D.
minimum: 12
maximum: 27
range: 17
mean: 15
median: 17

Answers

Hi There! :)

Find the minimum, maximum, range, mean, and median for the data set.12, 13, 13, 17, 18, 19, 27

A.
minimum: 12 
maximum: 27 
range: 15 
mean: 17 
median: 13

B.
minimum: 27 
maximum: 12 
range: 15 
mean: 17 
median: 17

C.
minimum: 12 
maximum: 27 
range: 15 
mean: 17 
median: 17

D.
minimum: 12
maximum: 27 
range: 17 
mean: 15 
median: 17

minimum: 12 maximum: 27 range: 15 mean: 17 median: 17

The reciprocal of a fraction less than 1 is always a fraction greater than 1. Why is this?

Answers

Let's see, an example of a reciprocal of a fraction less than 1 would be something like this: 1/8, after the reciprocal it will become 8/1.
8/1 equals 8 therefore is larger than 1.

This will always happen because as long as the denominator(the bottom) is larger than the numerator, the reciprocal(flipping the numbers) will make it larger than 1.
Here are some examples of reciprocals: 1/2 becomes 2/1.  1/3 becomes 3/1. 1/4 becomes 4/1.  Just swap the two numbers and the number that it becomes will be automatically larger than 1.

Which number is between 0.6 and 7/9

A 23/27
B 31/45
C 14/27
D 1/3

Answers

The best way to find the answer is to convert the fractions to decimals using a calculator.
(7/9) is (0.7777). This means that we are looking for a number between 0.6 and 0.7777.
A. (23/27) is .8519. This is not the answer.
B. (31/45) is .6889. This falls in between 0.6 and 0.777 because 0.6 is less than 0.6889 and 0.7777 is greater than 0.6889.

There is no reason to look at C and D because we know that B is the answer.

Which describes independent events?A) Selecting two tickets by choosing a raffle ticket at random from a jar and disposing of the first ticket before selecting the second ticket.

B) Selecting a blue and green balloon by choosing one string at a time at random from a clown's hand, handing the first choice to your brother.

C) Rolling two ones in a row using a standard die.

D) Getting 5 multiple choice questions correct if you select at random from each of the possible answers, never repeating an answer choice.

Answers

C.


All of the other answers are dependent because once the first action is complete, the sample from which you are selecting the second item is different from the first...


for example, A,

If you draw the first ticket out of, say, 25 total tickets, there is a 1/25 chance you will get that ticket. If you dispose of it and then draw a second ticket, there are now 24 total tickets so there is a 1/24 chance of getting that ticket.


C is independent because the dice itself doesn't change when you roll it again... there is a 1/6 chance of getting a one each separate time you roll.


hope that helped!
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