Answer:
B
Step-by-step explanation:
 
        
             
        
        
        
Answer:
They practiced a total of 75 math facts in all!
60 + 15 = 75 :D
 
        
             
        
        
        
3x-10+x+8=90
4×-2=90
4x=92
X=23
One angle is 31. 23+8
The second one is 59. 3 (23)-10
        
             
        
        
        
       f(x) = 3 - 2sin(x)
          0 = 3 - 2sin(x)
        - 3  - 3
         -3 = -2sin(x)
         -2        -2
        1¹/₂ = sin(x)
sin⁻¹(1¹/₂) = sin⁻¹[sin(x)]
sin⁻¹(1¹/₂) = x
        
             
        
        
        
We know that
cos²(theta)=0.21
sin²(theta)+cos²<span>(theta)=1
</span>sin²(theta)=1-cos²(theta)------> sin²(theta)=1-(0.21)-----> 0.79
 sin(theta)=√0.79
 sin(theta)=0.89
the answer is
the value of  sin(theta) is 0.89