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zzz [600]
3 years ago
9

Which equation has both 4 and -4 as possible values of y?

Mathematics
1 answer:
Vlad [161]3 years ago
8 0
Y2=16
Because
-4x-4=16
And
4x4=16
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Find the lengths of the missing sides in the triangle. Write your answers as integers or as decimals rounded to the nearest tent
nalin [4]

Answer:

The last one (x=11.3, y=8).

Step-by-step explanation:

1) There are three trigonometric ratios for right-angled triangles.

sin()=\frac{opposite}{hypotenuse}\\cos()=\frac{adjacent}{hypotenuse}\\tan()=\frac{opposite}{adjacent}

In a right triangle, the hypotenuse, h, is the side opposite the right angle. Relative to the acute angle θ, check the attachment, the legs are called the opposite side, o, and the adjacent side a.

2) In this case, we are given a length and an angle to find x and y.

Let's find x first. To find x we need to use sin()=\frac{opposite}{hypotenuse}.

sin(45)=\frac{8}{x}\\sin(45)x=8\\x=\frac{8}{sin(45)} \\x=11.31

Find y.

Notice that, we can use the Pythagorean Theorem (c^2=a^2+b^2) to find y.

c^2=a^2+b^2

11.31^2=8^2+b^2\\11.31^2 - 8^2 = b^2\\63.9161 = b^2\\\sqrt{63.9161} = b\\b = 7.99

3) Round them off to the nearest tenth.

x=11.31\\x=11.3

y=7.99\\y=8

Therefore, the correct choice is the last one (x=11.3, y=8).

4 0
2 years ago
How do you find the area of this regular polygon​
Maksim231197 [3]

Answer:

By using the formula of the octagon:

10m=1000cm

A ≈ 4.83×10^6 cm²

5 0
3 years ago
What is an equation of the line that passes through the points
LUCKY_DIMON [66]

Answer:  y=-3-1/2x

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3 years ago
In 5 rounds of a game, Jill scored -3, 8, 9, -7, and 13. What integer represents her average score for 5 rounds? Please answer A
RoseWind [281]

Answer:

4

Step-by-step explanation:

-3 + 8 + 9 + (-7) + 13 = 20

20/5 = 4

4 0
3 years ago
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Please help . tjjhhhhhhhh
natka813 [3]

Answer:

19 -  8√3

Step-by-step explanation:

(-4 + √2)^2

= (-4)^2 + 2(-4)(√3) + √3)^2

= 16 - 8√3 + 3

= 19 -  8√3

7 0
4 years ago
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