Factor the trinomial -3x^2-15x+42

Plzzz i beg u so much asaaaap ! what is the slope of this line? enter your answer in the box.

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?