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3 years ago

Nine people are entered in a race. If there are no ties, in how many ways can the first three places be

Mathematics

1 answer:

belka [17]3 years ago

4 0

Answer:

504?

Step-by-step explanation:

I think, hopefully I did my math current

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How do you put 20/80 in simplest form

Andrews [41]

GCF = 20

Reduce the fraction by dividing
the numerator and denominator by 20
and get the simplified answer

20 ÷ 20=1 || 80 ÷ 20=4
1/4 is your answer! :D

5 0

3 years ago

Read 2 more answers

Please helpp middle school math suppose 4<a<7. find all the possible values of 15-2a

bixtya [17]

9514 1404 393

Answer:

1 < 15 -2a < 7

Step-by-step explanation:

There are a couple of ways you can do this.

1) Put the minimum and maximum values of a into the expression to see what its corresponding values are:

15-2a for a=4:

15-2(4) = 7

15-2a for a=7:

15-2(7) = 1

Then ...

1 < 15-2a < 7

2) Solve for a in terms of the value of 15-2a, then impose the limits on a.

x = 15 -2a

2a = 15 -x

a = (15 -x)/2

Now, impose the given limits:

4 < (15 -x)/2 < 7

8 < 15 -x < 14 . . . multiply by 2

-7 < -x < -1 . . . . . . subtract 15

7 > x > 1 . . . . . . . . multiply by -1

1 < 15-2a < 7 . . . . . use x=15-2a

_____

The vertical extent of the attached graph is the range of possible values of 15-2a. It goes from 1 to 7.

8 0

3 years ago

Are these rates proportional?

Scilla [17]

Answer:

no is correct

Step-by-step explanation:

it is proportional until 8 ounces.

the first one is $0.75
you add another $0.75 and that equals $1.50
then you would add $1.50 and $1.50 then it equals $3.00 and it should be $2.50 so therefore it is not proportional

6 0

3 years ago

A high school play cost an up front $30,000 to produce, plus an additional cost as of $1000 for each perfromance. Every sold out

Zarrin [17]

Interpreted by text, we have got 2 function; 1 that describes the costs for ther performance and the other demonstrates the revenue.
f(x)= 1000x + 30 000
g(x)= 2500x
Two ways to work out when the school breaks on the
production of the play.
1- set these functions in geogebra and observe where cross each other. This value will be the answer as g goes higher than f
2- solve as an equation=> set f(x)=g(x) and work out the and afterward set the x value in f or g to find out the y coordinate

5 0

4 years ago

PLS HELP I’m in a quiz and I’m failing math and need to pass this

Zarrin [17]

Answer:

$\sqrt{2x - 5} + 4 = x \\ \sqrt{2x - 5} = x - 4 \\ 2x - 5 = {(x - 4)}^{2} \\ 2x - 5 = {x}^{2} - 8x + 16 \\ {x}^{2} - 10x + 21 = 0 \\ {x}^{2} - 3x - 7x + 21 = 0 \\ x(x - 3) - 7(x - 3) = 0 \\ (x - 3)(x - 7) = 0 \\ \boxed{x = 3 \: or \: x = 7}$

<h2>x=3 or x=7 is the right answer.</h2>

8 0

3 years ago