I think the average spend is 11 km. i don't know for sure..
Answer:the answer is the first
Step-by-step explanation:
Because the expression can be written as -10r2/2r2+4+5r/2r2+4+3/2r2+4
1. It's a proportion...50 over 12.5 = h over 50 then cross multiply and divide
2. Another proportion 7over x = 2 over 6 then cross multiply and divide
You solve by useing the formula (b/2) ^2
And your answer is x= 3,1
Solve by using the quadratic formula.
x=1+-i√5 / 6
