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sergij07 [2.7K]
2 years ago
5

15 members of the Drama Club can make set decorations for their musical in 12 hours. After 4 hours have passed, a few teachers c

ame to help, and the group completed the remaining work in 6 hours. How many teachers helped?
PLEASE help!!! I WILL AWARD BRAINLIEST.
Mathematics
1 answer:
Serga [27]2 years ago
4 0

Answer:

5 teachers

Step-by-step explanation:

We know that the 15 members finished 1/3 of the job in 4 hours. When the teachers came they finished 2/3 of the job in 6 hours. So they finished 1/3 of the join in 3 hours of we simplify it.

4 hour: 15 minutes

3 hour: ?

15/3 x 4= 20 teaches. Then we do 20-15=5 because there were originally 15 members.

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All these are true when X and Y are independent events:

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3) P(X | Y) = P(X).... this is the probability of X given Y is equal to the probability of X.

4) P (Y | X) = P(Y)

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6 0
2 years ago
Read 2 more answers
At a recent job fair, Intel boasted that they paid master's graduates more than 90% of all
ankoles [38]

Complete Question

A recent study found that hourly wages earned by employees possessing a master's degree are distributed normally with a mean of $27.50 and standard deviation of $3.50

At a recent job fair, Intel boasted that they paid master's graduates more than 90% of all

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Answer:

The value is x  =  \$31.986

Step-by-step explanation:

From the question we are told that they paid master's graduates more than 90% of all

Generally from the z-table the z-score for 90% is z =  1.282

This z-score can be mathematically represented as

z =  \frac{x - \mu }{\sigma}

Here x is the hourly wage they offer  employees with master's degrees

substituting  $27.50 for  \mu and   $3.50  for  \sigma  we have

       1.282 =  \frac{x - 27.50 }{3.50}

=> x  =  \$31.986

3 0
2 years ago
John runs 500 feet per minute. identify the correct conversion factor setup required to compute john's speed in inches per secon
nadezda [96]

Answer:

The correct answer is A) 12 Inches/1 Foot multiplied by 60 Seconds /1 Minute  

Step-by-step explanation:

The explanation is very direct and simple.

There are 12 Inches in every Foot and 60 seconds in every minute.

This is all that is required to accurately compute johns speed in inches per second.

Cheers!

4 0
2 years ago
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Simplify 4a³b² × 3a⁶b⁵​
Rasek [7]

Answer:

12a^9b^7

Step-by-step explanation:

Multiplying variables of the same base, will require you to add the exponents.

4a^3b^2 * 3a^6b^5

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a^3 * a^6 =   a^9

b^2 * b^5 =   b^7

12a^9b^7

4 0
2 years ago
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Solve this questions with steps
Alex_Xolod [135]
Provide better info thanks
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2 years ago
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