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horrorfan [7]
3 years ago
11

If a point P(–1, –1) is reflected across the line y = –2, what are the coordinates of its reflection image?

Mathematics
1 answer:
liraira [26]3 years ago
7 0
Any choices? I think I know this. 
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Which number makes the equation true?
Crazy boy [7]
A. 5

5*6=30, so 5/30= 1/6th
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3 years ago
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AVprozaik [17]

Area of a Circle = PI * radius^2

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3 0
3 years ago
Plutonium–238 has a yearly decay constant of 7.9 × 10-3. If an original sample has a mass of 15 grams, how long will it take to
eduard
The answer is 28 years

At = A0 * e^(-k * t)
At = 12 g
A0 = 15 g
k = 7.9 × 10^-3 = 0.0079 
t = ?

12 = 15 * e^(-0.0079 * t)
12/15 = e^(-0.0079 * t)
0.8 = e^(-0.0079 * t)

Logarithm both sides (because ln(e) = 1:
ln(0.8) = ln(e^(-0.0079 * t))
ln(0.8) = (-0.0079 * t) * ln(e)
-0.223 = -0.0079 * t
t = -0.223 / -0.0079
t = 28.23
t ≈ 28 years
8 0
3 years ago
Need Help with this question
Fantom [35]
82
The sum of the three angles is 180. One is given and the other we can figure out because it forms a straight line (180) with the angle to the left outside. The outside angle is 117, so 180-117 is 63.
So then add up the 3 angles in the triangle
63+35+y=180
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3 0
3 years ago
Look at this expression.
Dafna1 [17]

Answer:

-15x+5

Step-by-step explanation:

Multiply you'll get your solution

5 0
3 years ago
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