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Anastaziya [24]
4 years ago
5

: Ruben put an empty cup underneath a leaking faucet. After 1 1 2 112 hours, Ruben had collected 1 4 14 cup of water. What is th

e rate, in cups per hour, at which the water is leaking from the faucet?
Mathematics
1 answer:
slamgirl [31]4 years ago
6 0

Answer:

The rate is \frac{1}{6} cups per hour

Step-by-step explanation:

It took the faucet 1 1/2 hours equivalent 3/2 hours to fill 1/4 cup by leaking

We need to find the rate in terms of cups that can be filled by water in 1 hour.

Using unitary method:

it takes \frac{3}{2} h for \frac{1}{4} cup

it will take 1 h for how many cups?

= \frac{1 \times \frac{1}{4} }{\frac{3}{2} }= \frac{2}{4 \times 3}= \frac{2}{12}= \frac{1}{6} cups

Hence, the rate is \frac{1}{6} cups per hour

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Answer:

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Step-by-step explanation:

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2 years ago
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A student's grades in the three tests in College Algebra are 85, 60, and 69. a) How many points does the student need on the fin
Anastaziya [24]

Answer:

(a) The student need 82 points on the final to average 74.

(b) The student must score 41 points on the final, assuming that the final carries double the weight.

Step-by-step explanation:

We are given that a student's grades in the three tests in College Algebra are 85, 60, and 69.

As we know that the formula for calculating the average of numbers is given by;

          Average (Mean)  =  \frac{\text{Sum of all values}}{\text{Number of observations}}

(a) Let the points student need on the final test to average 74 be 'x'.

So, Average of all four test  =  \frac{85+60+69+x}{4}

                     74 = \frac{85+60+69+x}{4}

                     74 = \frac{214+x}{4}

                     214+x =74 \times 4

                      x = 296-214

                        x=82

Hence, the student needs 82 points on the final to average 74.

(b) It is given that the final carries double the weight, this means that let the points student need on the final test to average 74 be '2x'.

So, Average of all four test  =  \frac{85+60+69+2x}{4}

                     74 = \frac{85+60+69+2x}{4}

                     74 = \frac{214+2x}{4}

                     214+2x =74 \times 4

                      2x = 296-214

                        x=\frac{82}{2} = 41

Hence, the student must score on the final 41 points, assuming that the final carries double the weight.

7 0
3 years ago
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Vilka [71]
2n(n + 3) - 5(n + 3) = (2n-5)(n+3)

A. (n + 3) (2n - 5)
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Find the inner product for (5,-1)*(-3,6) and state whether the vectors are perpendicular. a. 21; no c. -21; no b. 21; yes d. -21
nataly862011 [7]

Answer:

c

Step-by-step explanation:

If the dot product of the vectors is zero then they are perpendicular

(5, - 1) • (- 3, 6)

= (5 × - 3) + (- 1 × 6) = - 15 + (- 6) = - 15 - 6 = - 21 ≠ 0

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