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erma4kov [3.2K]
3 years ago
6

Suppose y varies directly with x. Write a direct variation equation that relates x and y. Then find the value of y when x=12. y=

-10 when x=2
Mathematics
1 answer:
kramer3 years ago
4 0
Y = 20x + 7 for instance
then just substitute the values
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For a certain bathtub, the hot water faucet can fill the tub in 12 minutes. The cold water faucet can fill the tub in 8 minutes.
Fofino [41]

If both faucets are used together, it time taken by them to fill the tub is 4.8 minutes.

<h3>What is the concept of time and work?</h3>

Time and work share a fundamental idea in common with other arithmetic topics, namely the idea of proportionality.

When the amount of work is constant, efficiency is inversely proportional to the length of time required.

Important Time and Work Formula:

  • Work Done = Time Taken × Rate of Work.
  • Rate of Work = 1 / Time Taken.
  • Time Taken = 1 / Rate of Work.
  • If a piece of work is done in x number of days, then the work done in one day = 1/x.
  • Total Wok Done = Number of Days × Efficiency.
  • Efficiency and Time are inversely proportional to each other.

Calculation for the time taken by both faucet to fill the tub.

The unit should be tub per minute.

Then, do the reciprocal of the result to have minute per tub.

The hot water faucet can fill the tub in 12 minutes.

The cold water faucet can fill the tub in 8 minutes.

The filling rate for both faucets filling the tub at the same time is the sum of their rates.

Let 't' be the time taken by both faucets.

Then,

\frac{1}{12} +\frac{1}{8} =\frac{1}{t}

\frac{8+12}{8*12} =\frac{1}{t}

\frac{1}{t} =\frac{20}{96}

\frac{t}{1} =\frac{96}{20}

t = 4.8

Therefore, the time taken by both faucets to fill the tub is 4.8 minutes.

To know more about the formula for calculating power, here

brainly.com/question/20290932

#SPJ4

3 0
2 years ago
The ages of Jamal, Wesley, an John are consecutive integers.the sum of thier ages is 108.what are thier ages .
hodyreva [135]

Answer:

Step-by-step explanation:

We have three people

jamal = x (since im guessing hes the youngest)

wesley= x+1

John= x+2

the formula you would use is x+x+1+x+2=108

when you simplify that you get 3X+3=108

you subtract the 3 from 108 which leaves you with 3X=105

divide that by 3 which makes x=35

so

jamal is 35

wesley is 36

john is 37

3 0
3 years ago
Acellus. please help me
Doss [256]

by-step explaAnswer:

by-step epla

Step-nation:

a

6 0
3 years ago
On their first day of vacation, a family spent $127.92 for meals. The family spent $160.01 for meals the second day. By what amo
ehidna [41]

Answer:

D=32.09

Step-by-step explanation:

160.01-127.92=32.09

5 0
3 years ago
Read 2 more answers
BM 1: 2. Find the value of angles x and y in circle A.<br> .X=<br> 150°<br> 175°<br> y =<br> to
Sladkaya [172]

Answer:

x = 35

y = 17.5

Step-by-step explanation:

By Central angle and its corresponding arc theorem:

x° = 360° - (175° + 150°)

x° = 360° - 325°

x° = 35°

x = 35

By inscribed angle theorem:

y \degree =  \frac{1}{2} x \\  \\ y\degree =   \frac{1}{2}  \times 35 \degree \\  \\ y\degree =  17.5 \degree \\  \\ y \:  = 17.5

6 0
3 years ago
Read 2 more answers
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