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schepotkina [342]
3 years ago
15

PLEASE HELP! I’ll GIVE THE BRAINLIEST TO WHOEVER ANSWERS CORRECTLY!!

Mathematics
1 answer:
wariber [46]3 years ago
8 0

Answer:

its 8.5

Step-by-step explanation:

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120 pianists compete in a piano competition. (a) In the first round, 30 of the 120 are selected to go on to the next round. How
MissTica

Answer:

Step-by-step explanation:

Given

There are 120 Pianist in a competition

(a)In first round 30 pianist is selected

this can be done in ^{120}C_{30} ways

=\frac{120!}{(120-30)!30!}

=\frac{120!}{90!30!}

(b)In the second round 5 pianist is selected out of 30

this can be doe by =\frac{30!}{(30-5)!5!}

=\frac{30!}{25!5!}

=142,506

8 0
3 years ago
Which expression is equivalent to 3(7x – 5)?
Mamont248 [21]

Answer:

21x - 15

Step-by-step explanation:

if this answer helped u and u liked it, pls mark as brainliest! thx!

3 0
3 years ago
Solve this system using substitution then write your answer as an ordered pair (x,y) X-5y=4 and Y=2x+14
Nikolay [14]

Answer:

(74/9,274/9)

Step-by-step explanation:

You have

x-5y=4 and

y=2x+14

so we subsitute y in the first equation

x-5(2x+14)=4

x-10x-70=4

-9x=74

x=74/9

so y=2(74/9)+14

y=148/9+14

y=274/9

so the oredered pair is

(74/9,274/9)

4 0
3 years ago
Multiples of 9 less than 80
german
Multiples of nine: 9<span>,18,27,36,45,54,63,and 72</span>
6 0
3 years ago
2+90=? <br> please someone help asap
Oxana [17]

Answer:

92 :)

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
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