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2 years ago

Can some please do these for me

Mathematics

1 answer:

Contact [7]2 years ago

4 0

12. $\frac{r-3}{-4-(-8)} = -5$
$\frac{r-3}{4} = -5$
r - 3 = 4(-5)
r - 3 = -20
r = -20 + 3
r = -17

13. $\frac{r-2}{-2-5} = \frac{5}{6}$
$\frac{r-2}{-7} = \frac{5}{6}$
6(r - 2) = -7(5)
6r - 12 = -35
6r = -35 + 12
6r = - 23
r = $\frac{-23}{6}$

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Answer:

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Step-by-step explanation:

<u>slope- intercept form</u><u>:</u>

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Let's find the value of m first using the gradient formula.

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To find the value of c, substitute a pair of coordinates.

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2 years ago

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bixtya [17]

Answer:

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Step-by-step explanation:

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2 years ago

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madam [21]

Answer:

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2 years ago

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dmitriy555 [2]

Hopes this helps:

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2 years ago

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Brilliant_brown [7]

Answer:

7.5 days.

Step-by-step explanation:

Let t represent time taken by Nick in days to paint the house alone.

Part of house painted by Nick in 1 day would be $\frac{1}{t}$ .

We have been given that Brad paints a house in 5 days, so part of house painted by Brad in 1 day would be $\frac{1}{5}$ .

We are also told that when Brad's brother Nick joins him, they can paint a house in 3 days. So part of house painted by both Brad and Nick together in 1 day would be $\frac{1}{3}$ .