Translate the following sentence to English: "C'est une bonne journée pour aller à la plage."
It is a nice day to go to the beach.
The speed (v) of moving car is related to time by the following equation: v = 3 + 10t^2 (m/s) Find its acceleration at any given time (t).
acceleration, a by definition is the rate of change of velocity with respect to time. => a = (dv)/(dt) = 2*10t = 20t
The sum of two boys' ages is 30. The difference in their age is 7. Write a down two equations to represent this situation.
Using x and y to represent the boys' ages: x + y = 30 x - y = 7 where x is the age of the older boy