PLSSS HELP IF YOU TURLY KNOW THISS
2 answers:
Hello there!
5^-9
The Law of Negative Exponents states that if we have a number with a negative exponent, we flop it over.
Now, what am I talking about? Let's see..
We have 5^-9.
Now, we turn it into a fraction:
1 belongs in the numerator. After entering 1, enter 5 and then, enter 9.
Hope this helps you!
~Just a joyful teen
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Hi there! :)
y = 2x + 2
y = -2x - 6
Both equations are equal to "y", so we can simply set both equations equal to each other:
2x + 2 = -2x - 6
Add "2x" to both sides:
2x + 2x + 2 = -6
Subtract "2" from both sides:
4x = -8
Divide both sides by 4:
4x/4 = -8/4
x = -2
Substitute in this value of "x" back into either of the equations:
y = -2(-2) - 6
y = 4 - 6
y = -2
Therefore, the solution of the equations is at (-2, -2).
Answer:
(-7, -5)
Step-by-step explanation:
x² + y² + 14x + 10y − 7 = 0
Strategy:
Convert the equation to the centre-radius form:
(x - h)² + (y - k)² = r²
The centre of the circle is at (h, k) and the radius is r
Solution:
Group x and y terms together; move the number to the right-hand side.
x² + 14x + y² + 10y = 7
Complete the square for x
(Take half the coefficient of x, square it, and add to each side of the equation)
(14/2)² = 7² = 49
(x² + 14x + 49) + (y² + 10y) = 56
Complete the square for y
(Take half the coefficient of y, square it, and add to each side of the equation)
(10/2)² = 5² =25
(x² + 14x + 49) + (y² + 10y + 25 ) = 81
Express the result as the sum of squares
(x + 7)² + (y + 5)² = 9²
h = -7; k = -5; r = 9
The centre of the circle is at (-7, -5).
The graph of the circle below has its centre at (-7, -5) and radius 9.
