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schepotkina [342]
3 years ago
6

50 POINTS!!! Use the quadratic formula above to solve for h(t) = -4.9t^2 + 8t + 1 where h is the height of the ball in meters an

d t is time in seconds. Round to the nearest hundredth second!

Mathematics
2 answers:
myrzilka [38]3 years ago
4 0

Answer:

1.75 seconds

Step-by-step explanation:

Lets apply the quadratic formula-

- 8 +_ (sqrt of 64 + 19.6)

__________________

-9.8

-8 +_  9.1433

__________________

-9.8

x = 1.74931972 ( since x can only be positive in real life situations like when throwing a ball)

x = 1.75 rounded in seconds

LuckyWell [14K]3 years ago
3 0

Answer:

Step-by-step explanation:

h(t)= -8±√8^2-4(-4.9)(1)/2(-4.9)

h(t)=-8±√64-19.6/ -9.8

h(t)=-8±√44.4 / -9.8

h(t)=-8±6.6633325/ -9.8

h(t)= 0.14

The height will be 0.14

The time will be 2.02 seconds per meter

Hope that helps.

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Answer:

7ygfce

Step-by-step explanation:

4 0
2 years ago
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Need help to write equations for 5, 6 &amp; 7
Softa [21]
6)
A quadratic function has the form
y = ax^2 + bx + c

Use point (3, 5) in the equation above:

5 = a(3^2) + 3b + c
5 = 9a + 3b + c
9a + 3b + c = 5     Equation 1

Use point (4, 3) in the equation above:

3 = a(4^2) + 4b + c
16a + 4b + c = 3    Equation 2

Use point (5, 3) in the equation above.

5 = a(5^2) + 5b + c
25a + 5b + c = 5       Equation 3.

Now solve the system of equations of equations 1, 2, and 3 to find the coefficients, a, b, and c.

9a + 3b + c = 5
16a + 4b + c = 3
25a + 5b + c = 5

Subtract the first equation from the second equation.
Subtract the second equation from the third equation.
You get
7a + b = -2
9a + b = 2

Subtract the first equation above from the second equation to get.
2a = 4
a = 2

Substitute:
7a + b = -2
7(2) + b = -2
b = -16

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9(2) + 3(-16) + c = 5
18 - 48 + c = 5
c - 30 = 5
c = 35

The equation in standard form is

y = 2x^2 - 16x + 35

We can find it in vertex form:

y = 2(x^2 - 8x) + 35

y = 2(x^2 - 8x + 16) + 35 - 32

y = 2(x - 4)^2 + 3
3 0
3 years ago
Write an equation of the line below.
kondaur [170]

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6 0
3 years ago
Two packages weigh 3.92 pounds and 2.8 pounds. How many times heavier Is the first package than the second?
avanturin [10]

3.92/2.8=1.4

Unless it’s reverse.

2.8/3.92=0.714285714285 and so on.

3 0
3 years ago
A: 28, 23,30, 25, 27
Serggg [28]

Answer:

8

Step-by-step explanation:

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6 0
3 years ago
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