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nikdorinn [45]
2 years ago
7

It would take Steve 4 hours to paint a room. If Andre helps him, they can finish painting the room in 3 hours. How long would An

dre take to paint the room by himself?
Mathematics
1 answer:
Lapatulllka [165]2 years ago
6 0

Answer:

12 hours

Step-by-step explanation:

Given data

Steve= 4 hours

Steve and Andrea= 3 hours

Applying the combined work formula

1/A+1/B= 1/T

1/4+1/B= 1/3

solve for B

B+4/4B= 1/3

cross multiply

3(B+4)= 4B

3B+12= 4B

12= 4B-3B

12= B

Hence Andrea will spend 12 hours alone

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An apple farm claims that the average weight of all their apples is 8oz. A sample of 20 apples were picked that had a mean of 7.
Nimfa-mama [501]

Answer:

The mean apple weight is different from 8oz

Step-by-step explanation:

Claim : An apple farm claims that the average weight of all their apples is 8oz.

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Standard deviation =s = 0.95

Since n < 30

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x = 7.77

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Substitute the values :

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t =−1.0827

Since we are not given the significance level

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5 0
3 years ago
PLEASE FOR THE LORD JESUS PLEASE ANSWER ASAP!!!!!!!!!!!!!
ZanzabumX [31]

Answer:

Correct option: ninth one.

m∠CQD = 22°

m∠EQF = 33°

Step-by-step explanation:

as the segment BQG is a straight line, its angle is 180 degrees, so the sum of all those 5 angles is equal to 180 degrees. So, we have that:

m∠FQG + m∠EQF + m∠DQE + m∠CQD + m∠BQC = 180°

12 + 3x + 103 + 2x + 10 = 180

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5x = 55

x = 11°

Then, we have that:

m∠CQD = 2x = 22°

m∠EQF = 3x = 33°

3 0
3 years ago
If you had an additional 1.65 pounds to download songs, how many more songs could you have downloaded? Write and solve an equati
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you could download 2 more songs.

X.59, where X stands for the number of songs downloaded, and .59 for the price of the song. 2*.59=1.18, or you could add .59+.59+.59=1.77, and 1.77 > 1.65, meaning you wouldn't afford the third song

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