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3 years ago

A submarine was situated 800 feet below sea level.

Mathematics

1 answer:

Ghella [55]3 years ago

8 0

Answer:

New position = -525 ft or 525 ft below the sea level

Step-by-step explanation:

Lets h be the height of the sea.

Given:

A submarine was situated 800 feet below sea level.

It is ascends 275 feet.

We know that h = 0 on the surface of the sea.

When we go below the surface vertically inside the sea the height will become negative.

So the submarine was situated h = -800 feet below the sea level, and it is ascends 275 feet from -800 feet.

So the new height of the submarine is.

$h = -800 + 275$

$h = -525\ ft$

Therefore the new position of the submarine is 525 below the sea level.

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If (m+n)^2=m^2+n^2, what is (3^m)^n?

svp [43]

Answer:

$(3^m)^n=1$

Step-by-step explanation:

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2 years ago

You have 31 coins consisting of nickels and

pychu [463]

Answer:

There are 14 dimes and 17 nickels.

Step-by-step explanation:

Let x be number of nickels and let y be number of dimes.

Given that the total is $2.25 and there are 31 coins, we know that:

$0.05x +0.10y = 2.25$

$x+y = 31$

Solving for x yields:

$x=31-y$

We then proceed by plugging that back into the previous equation:

$0.05(31-y)+0.10y=2.25$

$1.55 - 0.05y +0.10y = 2.25\\$ --> Distribute

$1.55 +0.05y=2.25$ --> add y's together

$0.05y=0.7$ --> subtract 1.55

$y=14$ --> divide by 0.05

Therefore, x must equal 17, which means you have 14 dimes and 17 nickels.

7 0

2 years ago

A rectangle has the dimension 3 feet wide by 7 feet long. If the dimensions of the rectangle are tripled, What would the new dim

aev [14]

9 ft wide by 21 ft long, most likely

5 0

3 years ago

Read 2 more answers

Can you help me with this? 7

andrezito [222]

Answer:

65º

Step-by-step explanation:

The angle of a straight line is 180º, so ∠ABD=180º and ∠ABC=(180-6x)º
The sum of the interior angles of a triangle is 180, so (x+40)º+(3x+10)º+(180-6x)º=180
We can solve from there, x+40+3x+10+180-6x=180
Combine like terms, -2x+230=180
Subtract 230, -2x=-50
Divide by -2, x=25

m∠CAB=(x+40)º=(25+40)º=65º
m∠ABC=(180-6x)º=(180-150)º=30º
m∠BCA=(3x+10)º=(75+10)º=85º

4 0

2 years ago

Select the correct answer.

makvit [3.9K]

Answer:

Step-by-step explanation:

y = 52° ( Opposite Angles )

y + 2x = 180° ( Interior Angles )

$y + 2x = {180}^{o} \\ {52}^{o} + 2x = {180}^{o} \\ 2x = {180}^{o} - {52}^{o} \\ 2x = {128}^{o} \\ x = \frac{ {128}^{o} }{2} \\ x = {64}^{o} \\$

3 0

2 years ago