First do the exponents. 20*20=400. 3y is not the same type of number as the rest of them, so move on. (It might help to rearrange the equation: 400-2+3y.)
Subtract 2 from 400. This is 398. The answer is 398+3y.
Answer:
9.8 x 2.2 = 21.56 m
distance = time x speed
speed = distance ÷ time
Step-by-step explanation:
The highest point he reached occurred at the vertex, which is at t = -b/2a = 2.2 second. Plugging in t = 2.2
9.8 x 2.2 = 21.56ft
Higher cliffs don't accelerate your fall -- acceleration is constant during free fall. The pull of gravity decreases infinitesimally at higher elevations, but it pulls you with an equal force from the first second of your jump until you decelerate when you hit the water.
Step 1: Draw an arc from each of these points of intersection so that the arcs intersect in the interior of the angle. The compass needs to stay open the same amount throughout this step.
Step 2: Draw the ray from the vertex of the angle to the intersection of the two arcs drawn during the previous step.