Rewrite the quadratic function from standard form to vertex form.
f(x)=2x^2+8x+70
algebra 2
please help

An arrow is shot vertically upward at a rate of 180ft/s. use the projectile formula h=−16t2+v0t to determine at what time(s), in seconds, the arrow is at a height of 420ft. round your answer(s) to the nearest tenth of a second.

How many sides does a regular polygon have if each exterior angle measures 72a.3b.4c.5d.6

When a rectangle is dilated, how do the perimeter and area of the rectangle change?