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Lyrx [107]
2 years ago
12

Help me please !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics
2 answers:
olga2289 [7]2 years ago
7 0

Answer:

11.31

Step-by-step explanation:

Use the pythagorean theorem: c^2=a^2+b^2

18^2=14^2+b^2

324=196+b^2

128=b^2

b=11.31

harina [27]2 years ago
3 0

[Hello,BrainlyUser]

Answer:

\sqrt{128}

Step-by-step explanation:

Right, let write down the Pythagorean Theorem equation or standard form of it. before we plug in the numbers.

a^2+b^2=c^2

Right, so that is the equation of Pythagorean Theorem. So let plug in the numbers of b and c.

a^2+14^2+18^2

So we have our values of b and c. Now, how do we find the missing number?

Well, let simplify thing further by squaring the numbers we have already.

a^2+196+324

We will now subtract 196 from both side which gives us:

a^2=128

Now we can square root the answer.

\sqrt{a^2} =\sqrt{128}

Now, we are left with this:

a=\sqrt{128}

So the final answer is \sqrt{128} or the decimal value which is  [11.31370849]

Round: 11.31

[CloudBreeze]

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PLEASE HELP<br> 2. If f(x) = 3x2 – 7x + 2, then f(- 1) = ?<br> (A) 18<br> B. 12<br> C.-2<br> D.-8.
makvit [3.9K]

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

6 0
3 years ago
What is the volume of the sphere?
poizon [28]

Answer: 113.1

Step-by-step explanation:

The formula is \frac{4}{3}\pir^{3}

The radius is 3, and 3 cubed is 27.

Then, 27 x \pi is about 84.82

Finally, 84.82 x \frac{4}{3} is about 113.1

Hope this helps. Please mark as brainliest, thanks!

5 0
3 years ago
Read 2 more answers
A basketball player had scored 863 points in 33 games.
Anika [276]

Answer:

1. 62

2. 2144

Step-by-step explanation:

1. 863 ÷ 33 = 26.15151515

1600 ÷ 26.15151515 ≈ 62

2. 26.15151515 × 1600 ≈ 2144

8 0
3 years ago
Help pls im being timed
Nitella [24]

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: (hypothenuse)^2=(leg_1)^2+(leg_2)^2. And the main trigonometric ratios are:

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

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

sin45=\frac{opposite\; leg }{hypotenuse} =\frac{\sqrt8}{hypotenuse}\\ \\ \frac{\sqrt{2} }{2} =\frac{\sqrt{8} }{hypotenuse} \\ \\ \sqrt{2}*hypotenuse=2\sqrt{8} \\ \\ hypotenuse=\frac{2\sqrt{8} }{\sqrt{2}} =2\sqrt{4} =2*2=4

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,

sin \beta =\frac{opposite\; leg }{adjacent\; leg} =\frac{3}{4}\\ \\ sin \beta=\frac{3}{4}=0.84806\\ \\ arcsin\beta =48.59^{\circ \:}

Learn more about trigonometric ratios here:

brainly.com/question/11967894

#SPJ1

7 0
2 years ago
I really need help. I dont understand.
mash [69]
Y=-x-8
the y-intercept is 8, while the slope is 1
8 0
4 years ago
Read 2 more answers
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