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Vilka [71]
3 years ago
14

What is the slope of the line that passes through (3,-7) and (-1,1)

Mathematics
2 answers:
Yanka [14]3 years ago
8 0
-2 is the slope of the line

Tanya [424]3 years ago
7 0
Remark
Line slopes are found with the formula
m = (y2 - y1)/(x2 - x1)

Givens
y2 = 1
y1 = - 7
x2 = -1
x1 = 3

Sub and solve
m = (1 - - 7) / (-1 - 3)
m = (1 + 7) / -4
m = 8 / - 4
m = - 2
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Lin is playing hand ball and wants the ball to bounce off wall CB and land at D. Where on the wall should she aim if she's stand
ASHA 777 [7]

The triangles formed by the path of the ball and the wall in the given diagram are similar triangles.

<h3>Correct Response;</h3>

The point on the wall she should aim is; <u>A. 7.8 feet away from point B</u>

<h3 /><h3>Method by which the above value is obtained;</h3>

The possible diagram in the question is attached

Let <em>x</em> represent the distance from point <em>B</em> where the ball lands.

ΔCDE is similar to ΔABE, by Angle-Angle similarity postulate.

By trigonometric ratio, the tangent of the angles ∠CDE and ∠BAE are;

tan(\angle CDE) = \mathbf{\dfrac{20 - x}{25}}

tan(\angle BAE) = \mathbf{ \dfrac{x}{16}}

tan(∠CDE) = tan(∠BAE)

Therefore;

\dfrac{20 - x}{25} = \dfrac{x}{16}

Which gives;

16 × (20 - x) = 25·x

320 = 41·x

x = 320 ÷ 41 ≈ 7.8

The point on the wall she should aim if she's standing at point <em>A</em> is therefore;

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Learn more about trigonometric ratios here:

brainly.com/question/4326804

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Vinvika [58]

For compound interest, the formula is given below:

Amount = P(1+\frac{r}{100} )^{n}

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