Answer:
A. 27
Step-by-step explanation:
21 x 3 = 63
9 x 3 = 27
 
        
             
        
        
        
Answer:
b) 95
Step-by-step explanation:
equation:
3 x 30 + 5 
solve:
3 x 30 + 5 = 95
 
        
             
        
        
        
How much are they selling the shirts for ? how much debt do they have ?
        
             
        
        
        
X + 0.5y = 3
x^2 - y = 15
from the first equation:-
0.5y = 3 - x
y = 6 - 2x
Substitute for y in second equation:-
x^2 - (6 - 2x) = 15
x^2 + 2x - 21 = 0
x  =  [-2 +/- sqrt((4 - 4*-21)] / 2
    = 3.6904 ,  -5.6904
Plugging in these into  first equation we get
3.6904 + 0.5y = 3  so y = 2(3-3.6904) =  -1.3808
-5.6904 + 0.5y = 3 so y = 2(3 + 5.6904) =  17.3808
Solution is  x = 3.690, y = -1.381  ;   x = -5.690, y = 17.38 ( to 4 s.f's)
        
             
        
        
        
Answer:
f(5)=-43
Step-by-step explanation:
Hope this helps!!!!!!