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Anna [14]
3 years ago
9

Two water pumps, working simultaneously at their respective constant rates, took exactly four hours to fill a certain swimming p

ool. If the constant rate of one pump was 1.5 times the constant rate of the other, how many hours would it have taken the faster pump to fill the pool if it had worked alone at it's constant rate?
A. 5
B. 16/3
C. 11/2
D. 6
E. 20/3
Mathematics
2 answers:
Rashid [163]3 years ago
5 0

Answer:

A.5

Step-by-step explanation:

RUDIKE [14]3 years ago
3 0

Answer:

E. 20/3.

Step-by-step explanation:

Working in rates per hour to fill the pool:

1 / 1.5t + 1 / t = 1/4      where t = time in hours.

Multiplying through by  12t:

8 + 12 = 3t

t = 20/3  hours.

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I need help with how to solve this problem. It is #14. It already shows the answer (1point) but I need help on how to get there
Hitman42 [59]

Answer:

Option 4: 0.554

Step-by-step explanation:

As we can see that the intervals and their frequencies are given.

We have to calculate the probability of students' score falling between 70 and 89. It will use the frequency of both intervals 70-79 and 80-89.

So, combined scores of both intervals are:

172+105 = 277

Now to find the probability

= 277/500

=0.554

So option no 4 is the correct answer ..

7 0
3 years ago
What is the slope of a line that is parallel to the line shown
Angelina_Jolie [31]

Answer:

\frac{1}{4}

Step-by-step explanation:

Parallel lines have the same slope

The slope of the line shown is  \frac{1}{4}

Therefore, the slope of the parallel line will also be \frac{1}{4}

3 0
3 years ago
2 Find the sum: 8 7 + - = ?​
alukav5142 [94]

Answer:

15

Step-by-step explanation:

dont change the 10 and whats 8 + 7

7 0
3 years ago
Read 2 more answers
A race car travels at a speed of 230 miles per hour. The race track on which the car is competing is 400 miles long. About how l
olga nikolaevna [1]
To solve for this we will be using the formula S = D/T

S = Speed
D = Distance 
T = Time

First we need to re-arrange this formula to solve for time

T= D/S

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T=1.74 hours

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So it is 1 hour and 45 minutes
7 0
3 years ago
Read 2 more answers
Using the digits 0 to 9 ​
Gre4nikov [31]

Supplementary Angles:

\boxed{100°} and \boxed{80°}

Arithmetically speaking, the closest 2 supplementary angles can get (in 3 and 2 digits respectively) is the upwritten.

Complementary Angles:

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Simply, in this case, for angles to be numerically as close as possible - make both the angles 45°.

8 0
2 years ago
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