Arace car completed a race in 150 minutes. its average speed was found to be 150 km/hr. what is the total distance that the car has coverd?

Nine more than four times a number is the same as one less than twice the number. find the number?

Ahiker stands at an unknown elevation before he ascends 2 miles up a mountain to an elevation of 9 miles. find the elevation of the hiker before his ascent.

Simplify (8x2 − 1 + 2x3) − (7x3 − 3x2 + 1). −5x3 + 11x2 − 2 5x3 − 11x2 + 2 x3 + 2x2 + x3 x3 − 2x2 − x3