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Kitty [74]
3 years ago
12

Find the slope of a line that passes through (-2,1) and (4,9)

Mathematics
1 answer:
melamori03 [73]3 years ago
8 0

Answer:

m = 4/3

Step-by-step explanation:

To find the slope of a line use the formula, where "m" means slope:

m=\frac{y_{2}-y_{1} }{x_{2}-x_{1} }

*You don't need to show this part on paper*

Choose which point you want to be point 1 and point 2. Remember the points are written (x, y).

Point 1: (-2, 1)       x₁ = -2  y₁ = 1

Point 2: (4, 9)      x₂ = 4   y₂ = 9

Substitute the coordinates into the formula:

*Show this part on paper*

m=\frac{y_{2}-y_{1} }{x_{2}-x_{1} }

m=\frac{9-1 }{4-(-2) }         Simplify

m=\frac{8 }{6 }                Reduce by dividing by 2

m=\frac{4 }{3 }               Slope

The slope of the line is 4/3

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Find the simplest interest. principal = $870 interest rate = 3% time = 9 months
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Answer: $889.58

Step-by-step explanation:

⇒<u>Equation:</u>

A = P(1 + rt)

Turn 3% into decimal and you get 0.03, then 9 months/ 12 months = 0.75 years.

<h2><u>WORK ↓</u></h2>

⇒A = 870(1 + (0.03 × 0.75)) = 889.575

⇒A = $889.58

* Hopefully this helps:)  Mark me the brainliest:) !!!!

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3 years ago
Brian &amp; Paul share a lottery win of £7800 in the ratio 1 : 4. Brian then shares his part between himself, his wife &amp; the
Elza [17]

Answer:

The wife gets £468 over the son

Step-by-step explanation:

Firstly, we shall calculate the total amount Brian made from from what he and Paul won.

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Paul’s share is thus 1/5 * 7800 = 7800/5 = £1560

Now we have another ratio for sharing the amount Brain has at home.

The total ratio here is 1+6+3 = 10

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The son share is half of this which is 936/2 = 468

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Carlos has a string that is 24 inches long he wants to divide it into three equal parts write an equation to find how long each
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Answer: 24 ÷ 3


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