Answer:
x= -5
Step-by-step explanation:
its kinda complex, i don't know if my answer is right but i think it has to do with propertions
if its right can i have brainliest
Answer: $62.25
Step-by-step explanation:
The mark-up is $477.25 - 415 = $62.25
Answer:
that is stupit
Step-by-step explanation:
realy
Answer:
<em>The ball will take 8.90 seconds to hit the ground.</em>
Step-by-step explanation:
The height of a ball after t seconds is given by:

Determine how long will the ball take to hit ground level. Since the gound is 40 meters below the throwing point:

Rearranging:

Simplifying by 5:

Solving the quadratic equation with the formula:

With a=1, b=-8, c=-8


There are two solutions:
t=8.90 sec, t=-0.90 sec
Due to the nature of the problem, t cannot be negative, thus:
The ball will take 8.90 seconds to hit the ground.