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Agata [3.3K]
2 years ago
7

Help with question four please :)

Mathematics
1 answer:
Lilit [14]2 years ago
5 0

Answer:

if you have an equation already C. if you don't have a equation you should make one B.

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A pump can fill a swimming pool in 8 hours. The pool also has a drain that can empty the pool in 10 hours. If someone turns on t
cluponka [151]

Answer:

40 hours will it take for the pool to fill.

Step-by-step explanation:

A pump can fill a swimming pool in 8 hours.

Work done by pump to fill in 1 hour is  \frac{1}{8}

The pool also has a drain that can empty the pool in 10 hours.

Work done by pump to drain in 1 hour is  \frac{1}{10}

If someone turns on the pump to fill the pool, but forgets to shut the drain.

Work done by both pipe in 1 hour is

W=\frac{1}{8}-\frac{1}{10}

W=\frac{10-8}{80}

W=\frac{2}{80}

W=\frac{1}{40}

Both pipe filled \frac{1}{40} part of pool in hours = 1

Both pipe filled complete pool in hours = \frac{1}{\frac{1}{40}}=40

Therefore, 40 hours will it take for the pool to fill.

7 0
3 years ago
Use the following functions: yf(x) = 3x - 7
igomit [66]

Answer:

(f + g) (x) = 5x - 11

(f - g) (x) = x + 3

Step-by-step explanation:

f(x) = 3x - 7

g(x) = 2x - 4

to find ; (f + g) (x) and (f - g) (x)

now,

(f + g ) (x) =  f (x) + g(x)

                =  (3x - 7) +( 2x - 4 )

                =  3x - 7 + 2x - 4

                 =  5x - 11

again ,

(f - g ) (x) = f(x) - g(x)

                = (3x - 7) - (2x - 4)

                = 3x - 7 - 2x + 4

                =  x + 3

5 0
3 years ago
. The AutoCorrect feature can automatically capitalize the first letter in the names of days.
Vinvika [58]
True. The AutoCorrect feature can automatically capitalize the first letter in the names of days.
4 0
3 years ago
Write an equation of the line with the given slope, m and y intercept (0,b) m=-6, b =-1/2 plss
Arlecino [84]

Recall that an equation in slope-intercept form is as follows:

y=mx+b,

where m is the slope of the line, and (0,b) is the y-intercept.

Substituting m=-6, and b=-1/2 we get:

y=-6x+(-\frac{1}{2})\text{.}

Simplifying the above result we get:

y=-6x-\frac{1}{2}\text{.}

Answer:

y=-6x-\frac{1}{2}\text{.}

5 0
1 year ago
Assume the bear can walk in any direction at a rate of 2 miles per hour. Suppose the bear was last seen 4 hours ago.how large an
Arisa [49]
The bear can walk at a rate of 2 mph, which means after 4 hours it could have traveled 8 miles. That is our radius. To calculate the area of a circle, remember the formula
A = \pir^2

3.14 * 8^2 = A
3.14 * 64 = A
200.96 = A

An area of 200.96 square miles must be searched.
8 0
2 years ago
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