Answer: B. 12
Step-by-step explanation:
f(x) = 3x2 – 7x + 2
f(- 1) = ?
f(-1)=3(-1)^2-7(-1)+2
=3(1)+7+2
=3+7+2
=12
Answer: 113.1
Step-by-step explanation:
The formula is 


The radius is 3, and 3 cubed is 27.
Then, 27 x
is about 84.82
Finally, 84.82 x
is about 113.1
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Answer:
1. 62
2. 2144
Step-by-step explanation:
1. 863 ÷ 33 = 26.15151515
1600 ÷ 26.15151515 ≈ 62
2. 26.15151515 × 1600 ≈ 2144
The trigonometric ratios show that the angle FHE is 48.59°.
<h3>RIGHT TRIANGLE</h3>
A triangle is classified as a right triangle when it presents one of your angles equal to 90º. The greatest side of a right triangle is called hypotenuse. And, the other two sides are called cathetus or legs.
The math tools applied for finding angles or sides in a right triangle are the trigonometric ratios or the Pythagorean Theorem.
The Pythagorean Theorem says:
. And the main trigonometric ratios are:

It is important to remember that the sum of internal angles for any triangle is 180°.
From the question, it is possible to see 2 right triangles (HGF and FHE).
You can find the hypotenuse of the triangle HGF from the trigonometric ratio: sen Θ

The hypotenuse of triangle HGF is one of legs for the triangle FHE. The, you can find the angle FHE from the trigonometric ratio: tan β. Thus,

Learn more about trigonometric ratios here:
brainly.com/question/11967894
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Y=-x-8
the y-intercept is 8, while the slope is 1