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lora16 [44]
3 years ago
8

23=7y-47 what is the answer to this equation

Mathematics
1 answer:
Dovator [93]3 years ago
7 0

Answer:

y=10

Step-by-step explanation:

To solve, start by isolating the variable to one side of the equation by adding 47 to both sides

70=7y

Divide both sides by 7 to isolate the variable.

10 = y

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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
The profit for a new website can be represented by 5", in thousands of dollars, where x is the time, in
Oduvanchick [21]

Answer:

About 6 months

Step-by-step explanation:

1. Find X (5x=15000)

2. Log15000/log5=x

3. X=5.9

4. Round to 6

3 0
3 years ago
Read 2 more answers
4x + 2(x + 6). What is the simplified expression
Law Incorporation [45]

Answer:

6x + 12

Step-by-step explanation:

4x + 2 (x + 6)

4x + 2x + 12

6x + 12

4 0
3 years ago
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I need some help with this
lapo4ka [179]

Answer:

A. 1

Step-by-step explanation:

Since it's g(-4), we have to use the first option because that means that x is equal to less than -4.

3√x + 5

3 √-4 + 5

= 1

4 0
3 years ago
Enter the value of n for the equation
Lelechka [254]

Answer:

Step-by-step explanation:

4^3 × 4^n = 4^12

Using indices multiplication rule

4^(3+n) = 4^12

4 cancelled out 4

Therefore: 3 + n = 12

n = 12 - 3

n = 9

4 0
3 years ago
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