Please answer correctly!

Mathematics

1 answer:

blagie [28]2 years ago

6 0

Answer:

I. Evaluate the largest angle when x = 15

Explanation:

First, solve for x:

x + 8x + x + 30 = 180

10x = 180 - 30

10x = 150

x = 15

Here in the question, his friend wants to find the largest angle in triangle.

So, input x = 15 in the largest angle.

Which is, 8x = 8(15) = 120° <--- largest angle in the triangle.

You might be interested in

Double h then multiply 4 by the result

podryga [215]

$\huge\boxed{Hi\;there!}$

"Double h" means h^2 (h squared) or h times h.

Then, we multiply 4 by the result:

4h²

Remember, we always put a number before a variable.

h²4 is wrong and confusing.

The correct answer is

$\huge\boxed{\sf{4h^{2} }}$

$\huge\bold{Hope\;it\;helps!\;Good\;luck!}$

$\rm{StillEnjoyingLife :)$

5 0

3 years ago

A parabola, with its vertex at the origin, has a directrix at y = 3. Which statements about the parabola are true? Select two op

shutvik [7]

Answer:

Step-by-step explanation:

Let's answer these questions in an all-encompassing kind of explanation. If you plot the vertex and the directrix, you see that the vertex is below the directrix. Because of the fact that a parabola opens AWAY from the directrix, and wraps itself around the focus, we know it's an upside down parabola of the form

$4p(y-k)=-(x-h)^2$

The p value from the equation is a distance, specifically the distance between either the vertex and the directrix, or the vertex and the focus. The vertex is exactly in the middle of the directrix and the focus. So that tells us that the focus is 3 units below the vertex (because the directrix is 3 units above the vertex). We also know from this that p = 3.

Filling in the equation with a vertex of (0, 0) which is our h and k respectively:

$4(3)(y-0)=-(x-0)^2$ which simplifies to