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k0ka [10]
4 years ago
13

Help me!! I need help fast.

Mathematics
2 answers:
Elden [556K]4 years ago
7 0

Hot air rises and cold air sinks

Doss [256]4 years ago
4 0

Cold air is heavier and more dense then hot air and therefore sinks. Hot air rises. An interesting reason that hot air rises is <em>because </em>cold air sinks. When the cold air sinks it pushes up the hotter air.

Hope this helped!

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xz_007 [3.2K]

Answer:

A kite with a 100 foot-long string is caught in a tree. When the full length of the string is stretched in a straight line to the ground, it touches the ground a distance of 30 feet from the bottom of the tree. Find the measure of the angle between the kite string and the ground.

17°

27°

63°

73°

Step-by-step explanation:

3 0
3 years ago
Find+the+positive+value+for+α+if+the+radius+of+the+circle+3x^2+3y-6αx+12y-3α=0+is+4
Alik [6]

Answer:

\alpha=3

Step-by-step explanation:

<u>Equation of a Circle</u>

A circle of radius r and centered on the point (h,k) can be expressed by the equation

(x-h)^2+(y-k)^2=r^2

We are given the equation of a circle as

3x^2+3y^2-6\alpha x+12y-3\alpha=0

Note we have corrected it by adding the square to the y. Simplify by 3

x^2+y^2-2\alpha x+4y-\alpha=0

Complete squares and rearrange:

x^2-2\alpha x+y^2+4y=\alpha

x^2-2\alpha x+\alpha^2+y^2+4y+4=\alpha+\alpha^2+4

(x-\alpha)^2+(y+2)^2=r^2

We can see that, if r=4, then

\alpha+\alpha^2+4=16

Or, equivalently

\alpha^2+\alpha-12=0

There are two solutions for \alpha:

\alpha=-4,\ \alpha=3

Keeping the positive solution, as required:

\boxed{\alpha=3}

8 0
3 years ago
How long is ⅓ of 3 hours?
Nina [5.8K]

Answer:

1/3 of 3 hours should be 20 minutes

8 0
2 years ago
Read 2 more answers
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marysya [2.9K]

Answer:

2

Step-by-step explanation:

Since there are four negative signs, we have -1 multiplying each other 4 times,  multiplying by positive 2. This is then 1 * 2, which is 2.

7 0
4 years ago
Read 2 more answers
What is the value of n? <br> n/-3 - 2 = -18
SCORPION-xisa [38]

Answer:

48

Step-by-step explanation:

n/-3=-16

n=-16*-3

n=48

4 0
3 years ago
Read 2 more answers
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