Answer:
its b
Step-by-step explanation:
i did this
M + (-9.5) = -7.8
First, simplify your brackets. / Your problem should look like:
Second, change addition to subtraction. / Your problem should look like:
Third, add 9.5 to both sides. / Your problem should look like:
Fourth, simplify. / Your problem should look like:

Answer:
m = 1.7
Well, if you take x to be 25 seconds, there are 2.4x in 1min. So, that multiplied by 60, would be 144x. Therefore, 1/4 multiplied by 144x should be the answer.
The answer is 10/3, the whole number form of it is 3 1/3 :)
Average speed is given by [Total Distance] ÷ [Total Time]
Average speed =

km/hour