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spin [16.1K]
3 years ago
14

The height in feet of the projectile seconds after lunch is modeled by the equation h=32t - 16t2 how long after launch does the

projectile return to the ground
Mathematics
1 answer:
Gekata [30.6K]3 years ago
6 0
When h=0 is when it returns to the ground
solve

0=32t-16t^2
factor
0=16t(2-t)
set equal to zero

0=16t
0=t

0=2-t
t=2

at t=0 and 2
it returns after 2 seconds
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aalyn [17]

Answer:

x = 3

s = 11

z = 14

y = 2

Let me know if you need an explanation for this, I would be happy to help :)

4 0
2 years ago
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A cast member is selling balloons on Main Street. He has 8
xeze [42]

Answer:

4/76 or simplified as 1/19

Step-by-step explanation:

5/20 is for the probability of the first balloon

4/19 is for the probability of the second balloon

5/20 can be simplified to 1/4 so 1/4 x 4/19 = 4/76

4/76 can also be simplified to 1/19

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3 years ago
In Lucille’s class, 35% of the students have blond hair. There are 20 students in the class. How many students have blond hair.
MrRissso [65]

Answer:

7 the answer is 7

Step-by-step explanation:

1. We assume, that the number 20 is 100% - because it's the output value of the task.

2. We assume, that x is the value we are looking for.

3. If 20 is 100%, so we can write it down as 20=100%.

4. We know, that x is 35% of the output value, so we can write it down as x=35%.

5. Now we have two simple equations:

1) 20=100%

2) x=35%

where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

20/x=100%/35%

6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for what is 35% of 20

20/x=100/35

(20/x)*x=(100/35)*x       -

20=2.85714285714*x       -

20/2.85714285714=x

7=x

x=7

now we have:

35% of 20=7

we multiply both sides by x

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3 0
4 years ago
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Last question for today:
Sergeu [11.5K]

Answer:

     6+x

6             x

Step-by-step explanation:

The top question mark is 6+x. The bottom left question mark represents 6 unit squares and should be changed to 6. The large block on the right which has unknown value is x. Change the bottom right question mark to x.

7 0
3 years ago
A circle has centre (0, 0) and it passes through the point (5, -3)
Paraphin [41]

Answer:

radius = \sqrt{34}

Step-by-step explanation:

The radius r is the distance from the centre to a point on the circle.

Use the distance formula to calculate r

r = √ (x₂ - x₁ )² + (y₂ - y₁ )²

with (x₁, y₁ ) = (0, 0) and (x₂, y₂ ) = (5, - 3)

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3 years ago
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