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3 years ago

5

A submarine was at the surface of the water. 21 seconds later, it was at a depth of 294 meters. What was the average change in t

he submarines depth each second?

1 answer:

topjm [15]3 years ago

3 0

Step-by-step explanation:

21 seconds = -294 meters

=> 1 second = -294/21 = -14 meters

Hence the average change is -14 meters per second.

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A dog sleep from 10:36 PM to 3:36 AM.How long did the dog sleep?

jolli1 [7]

Answer:

5 hours.

Step-by-step explanation:

Note that the clock "restarts" at 12, and flips from PM to AM (and vice versa).

In this case:

1st hour: 10:36 - 11:36pm

2nd hour: 11:36pm - 12:36am

3rd hour: 12:36am - 1:36am

4th hour: 1:36am - 2:36am

5th hour: 2:36am - 3:36am

~

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3 years ago

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Solve for x in each of the following quadratic equations.

Eduardwww [97]

Okay so...
x² = 5x + 24 move it, so one side equals zero.
x² - 5x - 24 =0 factors of 24 is 3 and 8 when you subtract 8 from 3 you get -5.
(x+3)(x-8)
x+3= 0 or x-8=0
x= -3 or x=8

b. 2x² - 5x + 1=0
quadratic formula = -b +-√b²-4ac / 2a
a= 2 b= -5 c=1
-(-5) +-√(-5)² - 4(2)(1) / 2(2)

5+-√25 - 8 / 4
=5 +- √17 / 4

x= 5/4 + √17 / 4 or x= 5/4 - √17/4

i couldn't find the plus-minus sign that why there's (+-)
i hope this helps! :)

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4 years ago

2/9 divided by 9/1 what is it?

Sonbull [250]

Answer:

0.02469135802

Step-by-step explanation:

6 0

3 years ago

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Daisy has a marble collection in her room the ratio of blue marbles to red marbles are 4 : 7 if she has 24 blue marbles how many

Masteriza [31]

Answer:

The answer is 24:42

Step-by-step explanation:

All you have to do is multiply 7 by 6 because for every red marbles there are 6 marbles.

Hopes this helps!!

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3 years ago

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The function h(x)=1/x^2+1 is the result of the composition f(g(x)). If g(x) = x^2+1,what is f(x)? A f(x)=1/square root x B f(x)=

HACTEHA [7]

Answer:

Option B is correct

Step-by-step explanation:

Given: $h(x)=\frac{1}{x^2+1}$ is the result of the composition $f(g(x))$ .

Also, $g(x)=x^2+1$

To find: $f(x)$

Solution:

Take $f(x)=\frac{1}{x}$

Now check whether $h(x)$ is equal to $f(g(x))$ or not.

First find $f(g(x))$

$f(g(x))=f(x^2+1)=\frac{1}{x^2+1}$

Also, $h(x)=\frac{1}{x^2+1}$

Therefore,

$h(x)=f(g(x))$

So,

Option B is correct

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4 years ago