Answer:
D, 8/15
Step-by-step explanation:
1/3 + 1/5
= 1(5)/3(5) + 1(3)/5(3)
= 5/15 + 3/15
= 8/15
Answer:
To find average speed, you divide total distance by total time.
Answer:
she needs to work at least 12 hours tutoring,
Step-by-step explanation:
The rocket will take a time of approximately 2.686 seconds to hit the ground.
<h3>How much time does a rocket need to hit the ground?</h3>
The height of the rocket (h), in feet, is modelled by a quadratic equation, which is used to model free fall motion, that is, the motion of an object solely due to action of gravity. In this problem we must look for the time when the rocket hits the ground:
- 16 · t² + 40 · t + 8 = 0
(t - 2.686) · (t + 0.186) = 0
Only the first root offers a realistic solution, for time is a non-negative variable. The rocket will take a time of approximately 2.686 seconds to hit the ground.
To learn more on quadratic equations: brainly.com/question/1863222
#SPJ1
X- 6/4=7
x-6=7×4
x-6=28
x=28-6
x=22
