Answer:
question number 16 :11 is answer
Answer:
x=-6.5
Step-by-step explanation:

To change a mixed fraction, you'd multiply the number upfront, times the denominator, and then add that product to the numerator
that IS the new numerator, and you keep the denominator
thus
The distance to the store is
.. (0.3 h)*(10 mi/h) = 3 mi
The time home is
.. (3 mi)/(30 mi/h) = 0.1 h
The average speed is the total distance divided by the total time
.. speed = (3 mi +3 mi)/(0.3 h +0.1 h) = (6 mi)/(0.4 h) = 15 mi/h
Ishaan's average speed was 15 mi/h.