3 years ago

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 $=\frac{30!}{(30-5)!5!}$

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

$=142,506$

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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!

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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)

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3 years ago

Multiples of 9 less than 80

german

Multiples of nine: 9<span>,18,27,36,45,54,63,and 72</span>

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3 years ago

2+90=? <br> please someone help asap

Oxana [17]

Answer:

92 :)

Step-by-step explanation:

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