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4 years ago

Please help!!!!!!20 points

Mathematics

1 answer:

Anika [276]4 years ago

7 0

Ah You Must Divide Im Getting You An Answer But Just Know You Must Divide

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Law of cosine. Please help

Anna35 [415]

Answer:

B) 41.7

Step-by-step explanation:

Let $a=25$ , $b=32$ , and $c=37$ . Use the Law of Cosines equation to find angle A=x which is directly across from side $a$ :

$\displaystyle \cos(A)=\frac{b^2+c^2-a^2}{2bc}\\ \\\cos(A)=\frac{32^2+37^2-25^2}{2(32)(37)}\\ \\\cos(A)=\frac{1024+1369-625}{2(1184)}\\\\\cos(A)=\frac{2393-625}{2368}\\ \\\cos(A)=\frac{1768}{2368}\\\\A=\cos^{-1}\biggr(\frac{1768}{2368}\biggr)\\ \\A\approx41.7^\circ$

Therefore, the correct answer is option B, which means you were right!

5 0

2 years ago

Solve for r. p = 4r 3t

lara31 [8.8K]

P = 4r + 3t
4r = p - 3t
r = (p - 3t)/4

3 0

3 years ago

Using your knowledge of solving equations to solve the following problems.<br> 7x-9y=1<br> y=-x+7

Arturiano [62]

Answer:

-9y = -7x + 1

y = 7/9x -1/9 is the answer

6 0

3 years ago

Find the length of side AB.<br>Give your answer to 1 decimal place.

Luden [163]

Answer:

The answer is below

Step-by-step explanation:

A triangle is a polygon with three sides and three angles. Types of triangles are isosceles, scalene, equilateral, acute, obtuse and right angled triangle. A right angle triangle is a triangle with one angle being 90°.

Trigonometric ratios is used to show the relationship between the angles and sides of a right angled triangle. Examples are:

sinΘ = opposite/hypotenuse; cosΘ = adjacent/hypotenuse; tanΘ = opposite/adjacent

From the question:

cos(62) = AB/12

AB = 12 * cos(62)

AB = 5.6 cm

4 0

3 years ago

Find the area of a polygon and show step by step explanation pls

AysviL [449]

Answer:

156

Step-by-step explanation:

6×12=72

7×12=84

72+84=156

4 0

3 years ago