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3 years ago

After t seconds a ball thrown in the air from ground level reaches a given

Mathematics

1 answer:

horsena [70]3 years ago

3 0

Answer:

9 sec.

Step-by-step explanation:

I think you wrote the equations incorrectly. It probably is

$h = -16t^{2} + 144t + 100$

If that is true, then $100 = -16t^{2} + 144t + 100$

0 = -16 $t^{2}$ + 144t

-16t(t - 9) = 0

t = 0 or t = 9

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Write an equation of a line that has a y-intercept at (0, -6)

galben [10]

Answer:

$y=x-6$

Step-by-step explanation:

First to write this equation you will need to know <em>slope intercept form</em> which is the equation that the people that wrote this problem are presumably looking for. Slope intercept form can be simply written as $y=mx+b$ . The variable $m$ would be the slope while the variable $b$ would be the y -intercept.

So to find out this we would have to assume that m or the slope would have to be 1 so we would have $y=1x+b$ or $y=x+b$ .

Now we have the first half of the equation we can move on to the variable $b$ or the y-intercept (0,-6) . To find the variable $b$ we will just have to graph the point (0,-6) which as you can see from the picture is the y-intercept and that is -6 units below 0. So the final answer will be $y=x-6$

6 0

3 years ago

Read 2 more answers

If it takes Mr. French 22 min to get to school in the morning and he is traveling at a rate of 100 m per min how far is his hous

Nimfa-mama [501]

Answer:

220 m

Step-by-step explanation:

since it takes him 22 min, and each min he travels 100 m, you just have to multiply 22 by 100

22 x 100 = 220

3 0

3 years ago

27^{3x}=(1/9)^x<br> write in b^x=b^y form

iogann1982 [59]

Answer:

3^9x=3^-2x

Step-by-step explanation:

27^3x=(1/9)^x

3^3×3x=(1/3^2)^x

3^9x=3^-2x

5 0

3 years ago

the width of a rectangle is 12 cm less than the length the perimeter is 156 cm. Find the with and length

mamaluj [8]

We know that the perimeter of a rectangle is twice the length, plus twice the width.

P = 2L + 2W

We also know that the perimeter is 156.

P = 156

Finally, we know that the width is 12 less than the length.

W = L - 12.

The next thing that we do is substitute the information that we have into the original equation:

P = 2L + 2W

156 = 2L + 2(L - 12)

From this point we start to solve

156 = 2L + 2L - 24 <---we multiplied the '2' through the parenthesis

156 + 24 = 2L + 2L - 24 + 24

180 = 2L + 2L <--- getting like terms on same sides

180 = 4L <---combining like terms

180/4 = 4L/4 <--- getting like terms on same sides

45 = L <---now we have a value for L

Now we take the known value for L and substitute it in to our equation for W

W = L - 12

W = 45 - 12

W = 33

So now we have Length = 45 and Width = 33.

6 0

3 years ago

Read 2 more answers

So if a video that is 15:34 how long is it when 2 times speed

rusak2 [61]

Answer:

7:47

Step-by-step explanation:

Here are two ways of solving this:

The video will be half the time of 15:34, so you need to divide the time 15:34 by 2.

Method 1)

Use the tip. The video is 15 minutes and 34 seconds long.

Convert minutes to seconds: 15 * 60 = 900

Add 34 seconds to the 15 minutes: 900 seconds + 34 seconds = 934 seconds

The video is 934 seconds long.

Divide the total seconds by 2: 934/2 = 467

467 seconds = 420 seconds + 47 seconds = 7 minutes and 47 seconds

Answer: 7:47

Method 2)

Divide the minutes by 2 and divide the seconds by 2.

15 minutes and 34 seconds.

Divide minutes by 2: 15/2 = 7.5

Divide seconds by 2: 34/2 = 17

Now we need to add 7.5 minutes and 34 seconds.

0.5 minutes is half a minute, so it's 30 seconds.

7.5 minutes + 17 seconds =

= 7 minutes + 0.5 minute + 17 seconds

= 7 minutes + 30 seconds + 17 seconds

= 7 minutes + 47 seconds

= 7:47

Answer: 7:47

6 0

3 years ago