Answer: 490
Step-by-step explanation:
2x+8y=9
4x+16y=18
this is because the second equation is the first equation, but multiplied by 2. if one side is multiplied by 2, so is the other
the answer is 18
Step-by-step explanation:
f(1)= 64+6(1)
=64+6
=70.
thus, f(1) = 70
f(n)=f(n-1)+?
1=(1-1)+70
1=0+70
=70-1
=69
Deal 1 is the better deal because if it was $100, then 1 would be $60 and 2 would be $65.