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DochEvi [55]
3 years ago
12

If a = 9 and c = 20, the measure of ∠B = ____ degrees (to the nearest tenth).

Mathematics
1 answer:
Maslowich3 years ago
3 0
Answer: We are missing some data here, but it appears to be a right triangle question. Assuming that triangle ABC is a right triangle, the measure of angle B would be about 63.26 degrees.

If you draw a right triangle ABC with the given information, you will see that we have an adjacent side and hypotenuse with regard to angle B.

Therefore, we can write and solve the following cosine ratio.

cos(B) = 9/20
B = 63.26 degrees
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In triangle ABC, angle a and b are complementary, where the cos A= 0.5. What is the angle measure of B in degrees?
aleksley [76]

Angle B measures 30 degrees.

Step-by-step explanation:

Step 1:

If two angles are complementary, the sum of the two angles will equal 90°.

So if angles A and B are complementary, the sum of the angles A and B will equal 90°.

It is given that cos A = 0.5, we can determine the value of A by taking the cos inverse of the value 0.5.

Step 2:

If cos A = 0.5, A = cos^{-1} (0.5) = 60^\circ. So angle A is 60°.

As A and B are complementary, angle A + angle B = 90°.

So 60° + angle B = 90°, angle B = 90° - 60° = 30°.

So angle B measures 30° while angle A measures 60°.

8 0
3 years ago
Read 2 more answers
Carla has a dog walking service and makes $9 for every day works walking dogs. One week, she was sick and could only walk the do
Alexeev081 [22]

Answer: 18+36=$54

Step-by-step explanation: The first week that she was sick, she walked dogs 2 times, meaning she would earn $18 (2*9=18).

The second week when she walked dogs 4 times, she'd earn $36 (4*9=36).

5 0
3 years ago
Asha and Lucy are selling pencils in a school shop.
Akimi4 [234]

Step-by-step explanation:

7x+22=2(5x+2)

7x+22=10x+4 (-7x)

3x+4=22 (-4)

3X=18 (divide by 3)

X=6 pencils

check if the number is correct

asha= 7*6=42 42+22 is 64

Lucy= 5*6=30 30+2 is 3264/32 is 2

asha= 7*6=42 42+22 is 64Lucy= 5*6=30 30+2 is 3264/32 is 2there fore asha sells twice as many as Lucy

8 0
4 years ago
1+4=5 2+5=12 3+6=21 8+11=?
g100num [7]
I think the pattern is that you multiply the first number by the second , then add the first number. SO:
e.g. for the first one 1 x 4 = 4 , 4 + 1 = 5
for the second one 2 x 5 = 10, 10 + 2 = 12...
So for 8+11:
you do 8 x 11 = 88 , 88 + 8 = 96
7 0
3 years ago
What is the equation simplified
Lilit [14]

\bf \cfrac{2}{7}(2s+3)\implies \stackrel{\textit{distributing}}{\cfrac{2}{7}\cdot 2s+\cfrac{2}{7}\cdot 3}\implies \cfrac{2\cdot 2}{7}s+\cfrac{2\cdot 3}{7}\implies \cfrac{4}{7}s+\cfrac{6}{7}

4 0
3 years ago
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