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alexdok [17]
3 years ago
5

Solve each triangle. Round your answers to the nearest tenth

Mathematics
1 answer:
ivolga24 [154]3 years ago
7 0
You have to use the Law of Cosines here, since there's no other way to solve this.  it's not a right triangle, so you can't use the Pythagorean Theorem.  The Law of Cosines will help us find the missing side length then we will have to use the Law of Sines to find another angle.  Then after that we will use the Triangle Angle-Sum theorem to finish it off.  Ready? The Law of Cosines to find side b isb^{2} = a^{2}+ c^{2} -2ac cosB and fill in the info we know, which is everything but the b. b^{2} =(21) ^{2} +(29) ^{2} -2(21)(29)cos109. Doing all that math gives us that side b = 40.9 or 41. Now the Law of Sines to find missing angle A or C.  Let's find A. \frac{sinA}{21} = \frac{sin109}{41}.  That gives us that angle A is 29.  Now use the fact that all triangles add up to 180 to get that angle C is 42.  And you're done!

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tankabanditka [31]
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4 0
3 years ago
<img src="https://tex.z-dn.net/?f=%20%5Csqrt%5B3%5D%7B80%7D%20" id="TexFormula1" title=" \sqrt[3]{80} " alt=" \sqrt[3]{80} " ali
Marianna [84]

Start by decomposing the number inside the root into primes

Then group the terms into cubes if possible

\begin{gathered} 80=2\cdot2\cdot2\cdot2\cdot5 \\ 80=2^3\cdot2\cdot5 \\ 80=10\cdot2^3 \end{gathered}

rewrite the root

\sqrt[3]{80}=\sqrt[3]{10\cdot2^3}

then cancel the terms that are cubes and bring them out of the root

\sqrt[3]{80}=2\sqrt[3]{10}

7 0
1 year ago
2x+5=15<br><br> Solve for x<br> a.5<br> b.2<br> c.7<br> d.10
Black_prince [1.1K]

Answer:

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Step-by-step explanation:

3 0
3 years ago
A cylinder has a height h, and a radius (3h-2)
tekilochka [14]

Answer:

V= 4\pi (9h^2 -12h + 4)

Step-by-step explanation:

Given

Shape: Cylinder

Radius = 3h - 2

Height = h

Base\ Area = \pi (3h - 2)^2

Required

Simplify the volume

The volume is calculated as:

Volume = Base\ Area * Height

Substitute values for Base Area and Height

V= \pi(3h-2)^2*h

Expand the bracket

V= \pi(3h-2)(3h-2)*h

Open brackets

V= \pi (9h^2 -6h - 6h + 4) *h

V= \pi (9h^2 -12h + 4) *h

V= 4\pi (9h^2 -12h + 4)

6 0
2 years ago
4^{5} times 4^{3} WHAT'S THE ANSWER
Alchen [17]
4^8 is the answer according to the law of indices
7 0
3 years ago
Read 2 more answers
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