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coldgirl [10]
3 years ago
8

Which relations are functions?

Mathematics
1 answer:
pychu [463]3 years ago
5 0

For a relation to be a function every x value will have a single y value.

The first one has two x values of -2 but their y values are different so can’t be a function.

The second one has two 10’s with different y values so isn’t a function.

The 3rd one has 1 and -1 with the same y value, so isn’t a function.

The correct answer is the 4th choice

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What is the reduced fraction of 25 and 60?
tino4ka555 [31]
25/60?
That would be 5/12
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2 years ago
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;

  • <u>A, 7.8 feet away from point </u><u><em>B</em></u>

Learn more about trigonometric ratios here:

brainly.com/question/4326804

7 0
2 years ago
A circle with circumference 18 had an arc with 120 central angle. what is the length of the arc
lawyer [7]

Answer:

A circle with circumference 18 had an arc with 120 central angle.

=> Radius of that circle: R = 18/(2 x pi) = 2.86

=> Length of that arc: L = R x 120 x pi/180 = 2.86 x (2/3) x pi = 5.99

Hope this helps!

:)

5 0
3 years ago
Read 2 more answers
Estimate each product :<br> 1/9 x 83
Gnom [1K]

Answer:

8.5

Step-by-step explanation:

1/9=0.1111111111111

0.1111111111111=0.1

83=80 or 85

0.1*85=8.5

3 0
2 years ago
\frac{3}{2}+\frac{2x+1}{6}=-1<br> 2<br> 3<br> ​ <br> + <br> 6<br> 2x+1<br> ​ <br> =−1
malfutka [58]

Answer:

\frac{3}{2}  +  \frac{2x + 1}{6}  =  - 1 \\ 3 +  \frac{2x + 1}{3}  =  - 2 \\  \frac{9 + 2x + 1}{3}  =  - 2 \\ 10 + 2x =  - 6 \\ 2x =  - 16 \\ x =  - 8

5 0
2 years ago
Read 2 more answers
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