3 years ago

You are choosing 3 of your 8 trophies and arranging them in a row on a shelf.

Mathematics

1 answer:

nydimaria [60]3 years ago

4 0

${_8C_3}\cdot 3!=\dfrac{8!}{3!5!}\cdot 6=\dfrac{6\cdot 7\cdot 8}{6}\cdot6=336$

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Twenty-eight people in student council are running for the offices of president and vice-president. In how many different ways c

gulaghasi [49]

Answer: 756

Step-by-step explanation:

The president can be elected in 28 different ways. After a student is elected president, there are 27 students left to elect a vice president from. So there are 28 x 27 = 756 different arrangements.

8 0

3 years ago

6x+32=−2x

velikii [3]

Whatever you do to one side, you have to do to the other.
Try to get all the x values and regular values together.
To do that, just subtract both sides by 6x to cancel it out on one side and subtract it from the other side:

6x-6x+32=-2x-6x
=
32=-8x
now divide both sides by -8 to get the x by itself

32/-8=-8/-8x
= 32/-8=x
-4=x
so your answer is: x= -4

5 0

3 years ago

which is the correct simplified version of the expression shown after distrubuting and combining like terms? 1/3(9x-15)+2x

zhannawk [14.2K]

Answer:11x + 5

Step-by-step explanation:1/3 times 9X is 3x. 1/3 times 15 is 5. Now you have 9x + 5 + 2x

9x + 2x = 11x

Final answer: 11x + 5

7 0

3 years ago

Rational numbers are _____ natural numbers.<br> A. Always<br> B. Sometimes<br> C. Never

ratelena [41]

I think it is
A. Always

8 0

3 years ago

All the ratios that are equivalent to the ratio 12:3.

taurus [48]

Answer:

Step-by-step explanation:

12:3 = 12 divide by 3 = 4

3 divide by 3 = 1

8 0

3 years ago