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4 years ago

Geometry(please help on 1 and 2)

Mathematics

1 answer:

wel4 years ago

8 0

Answer:

1. C

2. B

Step-by-step explanation:

1. Remember your rules for rotating. When you're rotating 180 degrees (x,y) --> (-x,-y), this means that you flip your signs. So for example, (10, -3) turns into (-10, 3) the only thing you're changing are your signs.

2. Once again, remember your rules for rotating. When rotating 90 degrees clockwise flip your x and y, and change the sign of x. So (x,y) --> (y, -x). So for example, (13, 5) --> (-5, 13)

At the end of the day, this all comes down to knowing your rules and practicing. I promise you it gets easier. Good luck!

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What equation has a line through the point (4, -1) with a slope of -3.

vitfil [10]

Answer:

y = -3x + 11

Step-by-step explanation:

y = mx + b

y = -3x + b

y-int (b) = y-(-1) = -3(x-4)

=> y+1 = -3x + 12

=> y = -3x + 11

=> y = 11

y = -3x + 11

Hope this helps! :3

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3 years ago

How much is 5 quarters and 8 dimes?

polet [3.4K]

Answer:

205

Step-by-step explanation:

4 0

3 years ago

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Andy has a snowball (a perfect sphere) with the radius of 3 cm. He wanted the snowball to be bigger, so he spent four seconds pa

BigorU [14]

Answer:

Ratio = $\frac{64}{27}$

Step-by-step explanation:

Volume of Sphere is given by the formula:

$V=\frac{4}{3} \pi r^3$

Where

V is the volume

and

r is the radius

Original Volume, given r = 3, would be:

$V=\frac{4}{3} \pi r^3\\V=\frac{4}{3} \pi (3)^3\\V=\frac{4}{3}\pi (27)\\V=36\pi$

Increased snowball volume:

Radius increased 0.25 per second, he spent 4 seconds, so radius increase:

0.25 * 4 = 1 cm

New radius = 3 + 1 = 4 cm

New Volume would be:

$V=\frac{4}{3} \pi r^3\\V=\frac{4}{3} \pi (4)^3\\V=\frac{4}{3}\pi(64)\\V=\frac{256\pi}{3}$

Ratio of New Volume to Original would be:

$Ratio=\frac{\frac{256\pi}{3}}{36\pi}=\frac{256\pi}{3}*\frac{1}{36\pi}=\frac{64}{27}$

This is the ratio for current volume to original volume.

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3 years ago

Prove: 1-tan^2 x/ 1+tan^2 x= 1-sin^2 x

Bas_tet [7]

Check solution here.hope it will be of help.

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3 years ago

Which number line represents the solutions to |x – 5| = 1? A number line from negative 7 to 7 in increments of 1. Two points, on

pochemuha

Answer:

Two points, one at 4 and one at 6.

Step-by-step explanation:

<u>Equations with absolute value </u>

The absolute value of a number x denoted as |x| is a number with the same magnitude with a positive sign. When we know the result of an absolute value, we cannot know if the original number is positive or negative.

If |x| = a, a>=0, then x=a or x=-a

The equation to solve is |x – 5| = 1. If we apply the above criteria, then

x-5=1 or x-5=-1

Which gives us two possible solutions for x

x=6

x=4

The correct answer is

Two points, one at 4 and one at 6.

8 0

3 years ago

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