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____ [38]
3 years ago
10

The height (in feet) of punted football is a function of the time the ball is in the air. The function is defined by h(t) = - 7t

^ 2 + 48t . What is the height of the football after 4 seconds?
Mathematics
1 answer:
Kamila [148]3 years ago
8 0

Answer:

The height of the football after 4 seconds is 80 feet.

Step-by-step explanation:

You know that the height (in feet) of punted football is a function of the time the ball is in the air and it is defined by:

h(t) = -7*t²+48*t

To calculate the height of the ball after 4 seconds, you must replace the time t by the time of 4 seconds:

h(4) = -7*4²+48*4

Solving, you get:

h(4) = -7*16+48*4

h(4) = -112+192

h(4)= 80

<u><em>The height of the football after 4 seconds is 80 feet.</em></u>

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3 years ago
What is the value of x in the equation 1/5x – 2/3y = 30, when y = 15?
lianna [129]

Answer:

x = 200

Step-by-step explanation:

1/5x – 2/3y = 30

substitute in y

1/5x - 2/3(15) = 30

multiply

1/5x - 10 = 30

isolate the variable

1/5x = 40

multiply each side by 5

x = 200

4 0
3 years ago
Read 2 more answers
18x26=? I don't get how to do this
elena-s [515]

Answer:

468

Step-by-step explanation:

Set it up like the following-

18

26

--------

108

360

--------

408

Take the right number (6) and multiply it with 18

6 x 18 = 108

Now do the same with 2, except put a 0 at the end

2 x 18 = 36

add 0

360

Add both numbers-

360 + 108 = 468

6 0
3 years ago
PLEASE HELP ME THIS IS DUE IN TWO HOURS! :(
ikadub [295]

Answer:224 squared

Step-by-step explanation:

H

7 0
2 years ago
A student sets up the following equation to convert a measurement. Fill in the missing part of the equation
fomenos

Answer:

We have the equation:

(14 N/mm)*X = Y N/cm

So we want to transform 1/mm to 1/cm.

We know that:

10mm = 1cm

1 = 10mm/1cm (we want to have mm on the numerator, so it cancelates with the mm in the denominator)

then the conversion is from 1/mm to 1/cm is:

X = 10mm/cm

then we have:

(14N/mm)*(10mm/cm) = 140 N/cm

4 0
2 years ago
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