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lyudmila [28]
3 years ago
14

When you have a graph how do you know if it's a function?

Mathematics
2 answers:
butalik [34]3 years ago
3 0

Answer:

The vertical line test

Step-by-step explanation:

If the line as more than one y intercept, it's not a function

Snezhnost [94]3 years ago
3 0

Answer:B

Step-by-step explanation:

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A student who correctly answered 60 questions a test received a score of 75%. How many questions were on the test
Iteru [2.4K]
It would be 45 you take 60 x 75%


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3 years ago
mark borrows $2,100 at an 8% simple intrest rate for 9 months. What is the amount he is being charged for borrowing the money
Taya2010 [7]

Answer:

$ 126

Step-by-step explanation:

9 months is  3/4  of one year

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6 0
2 years ago
9 friends are lining up. Joe, Susan, John, and Meredith must be beside each other. How many ways can they line up?
ZanzabumX [31]
<h3>Answer:  17,280</h3>

This is one single number slightly over 17 thousand.

You may need to erase the comma when typing the answer in.

=========================================================

Explanation:

Let's say that another person steps in for Joe, Susan, John, and Meredith. I'll refer to this person as the teacher (perhaps these 9 friends are students on a field trip).

The 9 friends drops to 9-4 = 5 people when those four named people leave the group temporarily. Then it bumps up to 5+1 = 6 people when the teacher steps in. Wherever the teacher is located, the four friends that left will replace the teacher. This guarantees that those four friends stick together.

There are 6! = 6*5*4*3*2*1 = 720 ways to arrange those 6 people. The exclamation mark is a factorial symbol.

Within any of those 720 permutations, we have 4! = 4*3*2*1 = 24 ways to arrange those group of named people when they come back to replace the teacher.

So overall the answer is 4!*6! = 24*720 = 17,280

You may need to erase the comma when typing the answer in.

-------------

Side note: There are 9! = 362,880 ways to arrange all nine friends regardless if those four mentioned people stick together or not. We see that they stick together roughly (17,280)/(362,880) = 0.0476 = 4.76% of the time.

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Emily and her twin sister Erica were each given $500 for their birthday. Emily deposits her money in an account that pays 4.75%
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Emily will have $45.26 more money in her account

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