Answer: 8 hours
Step-by-step explanation: he gets 70.40$ to work for 4 hours so you'll have to multiply 4 by 70.40 to represent it's doubling to 8 and you'll get 281.60
70.40x4=281.60
so add this 4 to the other 4 it makes 8 because that's how much it would take to get there 4 steps up to really =8
i'm sooo dificult
The function rule is : y=x^2
I hope this helped
{ y=-8x
{ y=-4-10x
Substitution Method:
-8x=-4-10x
x=-2
y=-8(-2)
y=16
(x,y) = (-2,16)
Check solution
{ 16=-8(-2)
{ 16=-4-10(-2)
{ 16=16
{ 16=16
Elimination Method:
{ 8x+y=0
{ 10x-y=-4
{ 8x+y=0
{ -10x-y=4
-2x=4
x=-2
8(-2)+y=0
y=16
(x,y) = (-2,16)
*For checking, its the same with the substitution method
