Answer:
Step-by-step explanation:
4.The solution of the equations is (1,1)
Ax+2By = 0 .................................................................(1)
2Ax-4By = 16 ..............................................................(2)
Substituting in equation 1 and 2 in (1,1)
A+2B = 0 ......................................................................(3)
2A-4B =16 ......................................................................(4)
Substitute A=-2B in equation 4
-8B = 16
B = -2
A = -2×-2 = 4
5. We owned an ice-cream shop
For 12 double cones you have $24
And want to sell it for $2.50
∵For 10 double coins wr have to give $25
