Answer:
B
Step-by-step explanation:
Supplementary angles sum to 180°
If one angle is 77°, then the other angle is
180° - 77° = 103° → B
Answer:
To find the area of a circle you use the formula 
r is the radius so plug that in.
if you only have the diameter, just divide that number by 2 to get the radius
Answer:
5(a+5b)
Step-by-step explanation:
The greatest common factor is 5 and 5a/5=1a and 25b/5=5b.
Answer:
0.84
Step-by-step explanation:
The sine function is a trigonometric function.
We want to evaluate

The sine function can be found on most scientific calculators.
Make sure your calculator is in degree and enter sin 57
It will give you 0.83867
If you correct to the nearest hundredth, you get:
0.84
29 is an irrational number.