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Bogdan [553]
4 years ago
13

HELP! WILL GIVE BRAINLIEST!! EASY! GIVE LONG DETAILED ANSWER!

Mathematics
1 answer:
OLEGan [10]4 years ago
6 0

Answer:

x² + 2x + y² + 4y = 20

(x² + 2x + 1) - 1 + (y² + 4y + 4) - 4 = 20

(x + 2)² + (y + 4)² - 5 = 20

(x + 2)² + (y + 4)² = 25

Therefore, the center is (-2, -4) and the radius is √25 = 5.

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If a 20-foot ladder makes a 65° angle with the ground, how many feet up a wall will it reach? Round your answer to the nearest t
zysi [14]

We have an angle, a hypotenuse - the ladder length - and we're looking for the opposite side......the sine seems the way to go, here.....

sin 65 = opp / 20   multiply both sides by 20

20 sin 65 = opp = about 18.13 ft up the wall

7 0
4 years ago
Find the solution to the system of equations: x + 3y = 7
tigry1 [53]

Answer:

(-2,3)

Step-by-step explanation:

Doing it the way you did and working out the problem you substituted 3 into, x+3(3)=7, 3(3) is 9 and then you subtract 9 from both sides.

7-9=-2

x=-2

Then all you have to do is put it into ordered pairs.

(x,y)

(-2,3)

3 0
3 years ago
Order these expressions for least to greatest:
Sever21 [200]

Answer:

^3sqrt(-27), ^3sqrt(-8), 0, ^3sqrt(8), ^3sqrt(27), sqrt(10), 6, 8

Step-by-step explanation:

You just need to convert these to decimals to figure it out.

In our case

^3sqrt(-27) = -3

^3sqrt(-8) = -2

^3sqrt(8) = 2

^3sqrt(27) = 3

sqrt(10) = 3.16

So...

-3, -2, 0, 2, 3, 3.16, 6, 8

8 0
2 years ago
In the diagram shown, what is the ratio of shaded parts to unshaded parts?
11111nata11111 [884]

Answer: a

Step-by-step explanation:

4 0
3 years ago
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Answer:

10%

Step-by-step explanation:

5 0
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