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Julli [10]
3 years ago
5

A ball is thrown from an initial height of 2 meters with an initial upward velocity of 20 m/s. The ball's height h (in meters) a

fter t seconds is given by h=2+20t-5t^2. find all values of t for which the ball's height is 12 meters. Round your answers to the nearest tenth of a second.
Mathematics
1 answer:
vovangra [49]3 years ago
6 0
So 12 = 2 + 20t -5t^2

5t^2 -20t + 10=0

t^2 -4t + 2 = 0

Use quadratic formula to solve
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What is the next term of the geometric sequence. 135,45,15​
WINSTONCH [101]

Answer:

5

Step-by-step explanation:

Each term is 1/3 of the preceding term

135 / 3 = 45

45 / 3 = 15

15 / 3 = 5

5 0
3 years ago
Read 2 more answers
1) A bag contains six red marbles and eight blue marbles. You randomly pick a marble and then pick a second marble without retur
Elena-2011 [213]

Answer:

You would have 4 red marbles and 8 blue marbles since you didn't return the ones you took out to the bag.

Step-by-step explanation:

6 - 2 = 4

The 8 would stay the same

There for you would have 4 red marbles and 8 blue marbles left in the bag. Totalled you have 12 marbles in the bag and 2 out of the bag. (8 + 4 = 12)

Including the marbles in and out of the bag you have 14 marbles. The 12 inside the bag + the 2 outside of the bag = 14 marbles totalled.

5 0
3 years ago
Find the slope of the line that passes through the pair of points (4.5, 13.5) and (–3.5, –9).
Zigmanuir [339]
Given two points: (x₁,y₁) and (x₂,y₂) the slope "m" will be:
m=(y₁-y₂) / (x₁-x₂)                or                  m=(y₂-y₁) / (x₂-x₁)

In this case:
(4.5 , 13.5)
(-3.5 , -9)

m=(-9-13.5) / (-3.5-4.5)=-22.5 / -8=2.8125

Answer: the slope will be m=2.8125.
3 0
3 years ago
the area of a triangle is 49.28 square centimetres. if the base of the triangle is 8.8 centimeters, what is the height
Liono4ka [1.6K]

Answer:

11.2

Step-by-step explanation:

6 0
1 year ago
Which set of lengths are the side lengths
vodomira [7]

Answer:  3,4,5

Step-by-step explanation:

The right triangle theorem states the the two legs added together squared equal the hypotenuse squared

3^2+4^2=25

square root of 25 is 5 so b is 3,4,5 is the answer

8 0
2 years ago
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