Answer and Step-by-step explanation:
Lets solve each one and see which has solutions and which one doesn't have a solution.
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A) x + y = -6
x + y = 12
Solve for y for one of the equations, then plug it into the other equation.
y = -6 - x
x + (-6 - x) = 12 = -6 = 12 No Solution
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B) y = 2x + 5
y = -3x + 1
2x + 5 = -3x + 1
4 = - 5x
Solution
_________________________________________________________ C) y = 4x - 8
y = 2x - 4
4x - 8 = 2x - 4
2x = 4
x = 2 Solution
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D) -5x + y = 7
x + 3y = 5
x = 5 - 3y
-5(5 - 3y) + y = 7
-25 + 15y + y = 7
16y = 32
y = 2 Solution
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So, A is the correct answer. Sorry for the late answer!
#teamtrees #WAP (Water And Plant)
This is an ellipse.
Equation of an ellipse:
Let's find the center point first. We can do this by finding out the midpoint between the vertices or the foci.
(-9+7)/2=-1
Center: (-1,3)
Now we need to find a and b (length along x and length along y).
We know "a". It is the distance between the center and the right or left bound.
a=7-(-1)=8
To find out "b", first see that...
b^2=a^2-(distance from center to foci)^2
foci distance=3-(-1)=4
b^2=8^2-4^2
b^2=64-16
b^2=48
b=4√3
answer:
Answer:
Step-by-step explanation:
Given
Required
Complete the blanks
We have:
Rewrite as:
Cross multiply