Answer:
Step-by-step explanation:
Since A = 50 degrees, c = 10 ,and since it is a right Triangle, then C = 90 degrees and so B = 180 - (90 +50)......... sum of angles of a triangle
                             B = 180 - 140
                              B = 40 degrees 
Using sine rule : a/sin A = b / sin B = c / sin C
To calculate a, then we use a/ sin A = c / sin C , since we know c and C
 i.e a/ sin 50 = 10 / sin 90
recall that sin 90  = 1
then we have a / sin 50 = 10 / 1
cross multiply
 a = 10 x sin 50
  a = 10 x 0.76604
   a = 7.6604
We will calculate b following the same procedure 
b/ sin B = c / sin C 
b/ sin 40 = 10/ sin 90
b/ sin 40 = 10/ 1
            b = 10 x sin 40
             b = 10 x 0.64279
              b = 6.4279
Therefore a ≈7.6604  , b ≈ 6.4279
 
        
             
        
        
        
B. 180cm3
You have to find length, width, and height of both objects. 
For the first one multiply:
3 x 8 x 5 = 120
Then multiply:
2 x 5 x 6 = 60
Add them together:
120 + 60 = 180cm3
        
             
        
        
        
Answer:
Claire owed Martha $8 she originally owed Martha 12 but already gave her 4 this was a problem for Claire considering she only got $4 a week
 
        
             
        
        
        
Step-by-step explanation:
<u>Pattern 1</u> :
Arithmetic Sequence 
Common term = 4
<u>Pattern 2</u> :
Geometric Sequence 
Common ratio = 2
 
        
             
        
        
        
3420°
explanation:
the equation of the sum of interior angles are (n-2)x180 
polygon above has 21 sides so you sub n as 21 and plug the equation in the calculator