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3 years ago

A survey of 80 students found that 24 students both play in the band and play a sport. But 22 students are not in

Mathematics

1 answer:

xenn [34]3 years ago

4 0

Answer:d

Step-by-step explanation:

Got it right

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The quotient of 10 plus x and y minus 3?

Ierofanga [76]

(10 + x) / (y - 3)....quotient is the result of division

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3 years ago

A committee must be formed with 5 teachers and 4 students. If there are 6 teachers to choose from, and 15 students, how many dif

ZanzabumX [31]

Answer:

8190 ways

Step-by-step explanation:

Given

$Teachers = 6$

$Students = 15$

Selection

$Students = 4$

$Teachers = 5$

Required

Number of ways of selection

4 students can be selected from 15 students in:

$Students= ^{15}C_4$

Similarly.

5 teachers can be selected from 6 teachers in:

$Teachers= ^{6}C_5$

So, the required number of selection is:

$Selection = ^{15}C_4 * ^6C_5$

Apply combination formula:

$Selection = \frac{15!}{(15-4)!4!} * \frac{6!}{(6-5)!5!}$

$Selection = \frac{15!}{11!4!} * \frac{6!}{1!5!}$

$Selection = \frac{15*14*13*12*11!}{11!*4*3*2*1} * \frac{6*5!}{1*5!}$

$Selection = \frac{15*14*13*12}{4*3*2*1} * \frac{6}{1}$

$Selection = \frac{32760}{24} * 6$

$Selection = 1365 * 6$

$Selection = 8190$

8 0

3 years ago

A tutot earns $105 for 3 hours of tutoring. How much would she earn if she tutored for

AlexFokin [52]

Answer:

$297.50

Step-by-step explanation:

If she earns 105 for three hours, she would be earning $35 an hour.

105/3=35

If she works 8.5 hours, to find the amount you would multiply the hourly rate ($35) by 8.5. So, the answer is

8.5x35=$297.50

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3 years ago

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What belongs in the box marked with the question mark in the proof?

koban [17]

<span>the blank boxes are for you to plug in x=20 to prove its right. so it would be 3(20)-4=2(20+8) 60-4=2(28) 56=56 so its true!</span>

6 0

4 years ago

Perform the following food service calculation.

Paul [167]

Answer:C

Step-by-step explanation:

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3 years ago

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