Factorise the following. a) 7x+7y b)6y²-4y
c)15x-9x²
d)x²y+y²+z²y
please help !! urgently ​

Adalyn drove 12 miles from her home to her school and then drove back. graph a shows her distance from home during the trip. graph b will show her distance from the school during the trip. complete each statement about graph b.

Graph y ≥ -x^2 - 1. click on the graph until the correct graph appears.

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?