Arace car driver completed 60 laps in 1 hour and 30 mins at a speed of 180 km/h. how many km has she raced in total. show your work!

Isabel graphed the following system of equations. 2x – y = 6 y = -3x + 4 she came up with the solution (2,-2). what were the 3 steps she did to get that solution? (make sure they are in the correct order)

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)

Gabrielle's age is three times mikhail's age. the sum of their ages is 40 . what is mikhail's age? __ years old