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saul85 [17]
3 years ago
14

I need help finding X please

Mathematics
1 answer:
Vedmedyk [2.9K]3 years ago
7 0

Hello

This is a right angle as you can see by the small square at the bottom. So this means that it is 90 degrees.

Because we already know part of the 90 degrees, we can do 90-50 degree which leave us with 40 degrees.

So as we look at 8x, it needs to equal 40

- 8x=40 divide both sides by 8

- x=5

Hope this helps!

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The image below is made from a regular octagon and a regular triangle.<br> What is the value of x?
notsponge [240]
For some reason I think it’s 60 but hopefully I’m right?! シ
7 0
3 years ago
Y=x^{2} +2x-8 determine the axis of symmetry, the vertex point and find the roots by factoring
Inessa [10]

Answer:

x = -1 <--- axis of symmetry

(-1, -9) <-- vertex

2, -4  (or, in my old precalc class we wrote our roots as (2,0) and (-4,0))   <--- roots

Step-by-step explanation:

a) Axis of symmetry equation is defined as

-b/2a = x  (i memorized this)

Quadratic equation form:

ax^2+bx+c

And our original equation:

x^2+2x-8

So..

-2/2 = - 1

So our axis of symmetry is at x = -1,

b) now vertex point can be found by plugging this value back into our original equation.

y = (-1)^2+2(-1)-8

y = 1 - 2 - 8

y = - 9

So our vertex is at (-1, -9)

c) Finally, lets factor

x^2+2x-8 = 0  (when finding the roots, set y = 0, because we are trying to find where we cross the x-axis)

x^2-2x+4x-8 = 0

x(x-2) + 4(x-2) = 0

(x-2)(x+4)=0

x = 2; x = -4 <--- Roots

4 0
3 years ago
What is the perimeter of abc
Ede4ka [16]

perimeter ≈ 18.9 units ( to 1 dec. place )

Calculate the lengths of the 3 sides using the distance formula

d = √( (x₂ - x₁ )² + (y₂ - y₁ )²

with (x₁, y₁ ) = A(1, 1) and (x₂, y₂ ) = B(9, 2 )

d = √( (9 - 1 )² + (2 - 1 )² ) = √(64 + 1 ) = √65

repeat with (x₁, y₁ ) = B(9, 2) and (x₂, y₂ ) = C(4,5 )

d = √( (4 - 9 )² + (5 - 2 )² ) = √(25 + 9 ) = √34

let (x₁, y₁ ) = A(1, 1 ) and (x₂, y₂ ) = C(4, 5 )

d = √( (4 - 1 )² + (5 - 1 )² ) = √(9 + 16 = √25 = 5

perimeter = √65 + √34 + 5 ≈ 18.9 units


5 0
3 years ago
10 x 5/6 please answer
exis [7]
The answer is 25/3 or in decimal 8.333333
4 0
2 years ago
Read 2 more answers
the distance around a meteor crater is 9687 feet find the diameter of the crater use 22/7 for pi round to the nearest tenth
WARRIOR [948]
Assuming that the meteor crater forms a hemisphere, the formula for the surface area of the crater would be 2(pi)(radius^2). Set the crater equal to the formula for a hemisphere and substitute pi for 22/7 and you’d get 9687 = 2(22/7)(radius^2). Do some quick magic on the calculator to simplify and you end up with about 60,889.71 = radius^2. Take the square root from both sides and you get 246.8 when rounded. That should be the length of the radius, and so to find the diameter, just multiply that by 2 to get 493.5. Now I don’t really know what shape you mean by meteor crater, so we’re just assuming here that you mean half of a sphere, or a hemisphere. Don’t know if this is what you’re looking for, so good luck.
8 0
3 years ago
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