Y= -2x-5
Y=8x+5
^^ those two equations are basically the same so you put them side by side like:
-2x-5=8x+5
Subtract 5 on both sides which leads to:
-2x-10=8x
Add 2x both sides:
-10=10x
Divide both sides by 10
-1=x
Answer:
60
Step-by-step explanation:
This is multiplying by the powers of 10:
100=
Equation:-
=(0.6) x 
=60
Answer:
37
Step-by-step explanation:
if lucy was half lisa's age at 6, that means she was 3. so there's a 3 year difference between the two sisters, so now if Lisa is 40, that makes Lucy 37.