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NNADVOKAT [17]
3 years ago
7

99 POINTS.... PLEASEEEEE HELP !!!

Mathematics
1 answer:
Nookie1986 [14]3 years ago
5 0
You have a lot of questions here, I can help with some.

1) To find the inverse, switch the x and f(x) and solve for f(x).
x = 3f(x) - 7
x + 7 = 3(f(x)
(x + 7) / 3 = f(x)

2) It is a function, because each input pairs with only 1 output.

3) Any diagonal line would be a function.

4 - 8 (We can't do without the diagram)

9) f(-9) = 3(-9) - 6
    f(-9) = -27 - 6 
    f(-9) = -33

10) f(-2) = 42 + 3
      f(-2) = 45 
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X <-4 graphed as an inequality on a number line
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Please help, simplify the polynomial 14x^2+4+3x-12x^2-3+11x
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When is the function increasing?
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3 0
2 years ago
Read 2 more answers
How many different three digit numbers can be made with 123456789
FinnZ [79.3K]

Answer:

84

Step-by-step explanation:

Since, the digit should be in ascending order, therefore we have to group 123456789 into 3–3 groups with its digits being in ascending order.

<em>Step 1:</em>

Select 1 as one digit

<em>Step 2:</em>

Select 2 as a 2nd digit.

<em>Step 3: </em>

We have 7 numbers (3,4,5,6,7,8,9) as a 3rd digit of a 3-digit number. Therefore, We have 7 numbers in the form of 12_.

Go back to Step 2 and Select 3 as a 2nd digit. Then, we have 6 numbers (4,5,6,7,8,9) as a 3rd digit of the form 13_.

Continue these steps till you get the number of 3-digit numbers in the form of 1__ to 189 which will be 28 numbers.

Go back to Step 1 now and select 2 as a 1st digit and in Step 2, start with 3 as a 2nd digit.

In step 3, you’ll have 6 numbers (4,5,6,7,8,9) as a 3rd digit of the form 23_.

Continue these steps till you find the number of the 3 digit number of the form 2__ to 289 which will be 21

Repeat the steps again to find the number of 3digit number of the form 3__ to 389 which will be 15.

Then find 4__ to 489, 5__ to 589, ……till 789

the answers will be like this

1__=28

2__=21

3__=15

4__=10

5__=6

6__=3

789 which is 1

Adding all these, you’ll get 84.

4 0
2 years ago
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