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3 years ago

It takes 20 minutes for 5 people to paint 5 walls.

Mathematics

2 answers:

cestrela7 [59]3 years ago

6 0

Answer

it would take 41 minutes to paint the wall

NemiM [27]3 years ago

5 0

Answer:

20 minutes

Step-by-step explanation:

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What the answer to this

GenaCL600 [577]

Answer:

for which

Step-by-step explanation:

3 0

3 years ago

3x+25=85 would x= 20 or 180

defon

Umm Sir, the answer would be as follows: 3x+25=85
-25 -25
3x=60
/3 /3
x=20

6 0

3 years ago

Read 2 more answers

A 25% vinegar solution is combined with triple the amount of a 45% vinegar solution and a 5% vinegar solution resulting in 20 mi

Murrr4er [49]

Complete Question: A 25% vinegar solution is combined with triple the amount of a 45% vinegar solution and a 5% vinegar solution resulting in 20 milliliters of a 30% vinegar solution.

Write an equation that models this situation and explain what each part represents in the situation. Then solve the equation.

Step-by-step explanation:

let the volume of the 45% vinegar solution be x litres ,

the volume of the 25% vinegar solution be 3x

and the volume of the 5% vinegar solution be y

summation of all gives,

x+3x+y = 20

4x + y = 20

subtracting 4x from both sides to make y the subject of the equation, we have;

y = 20 - 4x

To the concentration:

substituting for the value of x and y into equation x + 3x + y = 20, we have,

.45x + .25(3x) + .05(20-4x) = .3(20)

multiplying through by 100 to make whole figures we have;

45x + 25(3x) + 5(20-4x) = 600

45x + 75x + 100 - 20x = 600

120x - 20x + 100 = 600

100x + 100 = 600

subtracting 100 from both sides, we have;

100x = 600 - 100

100x = 500

dividing both sides by 100,

x = 5.

7 0

3 years ago

1. Both Carmen and her brother Michael want to borrow their father’s car on a Friday night. To determine who gets to

jeyben [28]

Answer:

no; either way the probability is 1/6

Step-by-step explanation:

There are 6 ways to roll a 2, 3, 11, or 12. There are 6 ways to roll a 4 or 10. Either of these two outcomes has a probability of 6/36 = 1/6. Since the probabilities are the same, we conclude the method is fair. Michael is not correct.

The table below shows the possible outcomes for a roll of a pair of dice.

7 0

3 years ago

Need help with this one

noname [10]

Answer:

f(g(x)) = $\frac{x}{7}$ ; g(f(x)) = 7x - 30

Step-by-step explanation:

6 0

3 years ago