When I put it in my calculator I got d=5
The answer is 5 <span>h/km. Because the unit is already in 1 hour, you don't need to divide and h/km is just the Canadian way to say km/h. </span>
First, we separate all instances of t by subtracting J from both sides:
F = J + Jrt
F - J = Jrt
Then, we separate the t by dividing both sides by Jr:

Therefore, t is equal to (F - J) ÷ Jr
Answer:
x=22.5
Step-by-step explanation:
BM||DT
Using Intercept theorem/Intercept theorem

6(9+x)=9*21
54+6x=189
6x=135
x=22.5
At least I think so