What are the coordinates for B
1 answer:
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Answer:
The point of intersection is (3,1)
Step-by-step explanation:
Manipulate these equations to achieve the form of y = mx + c
1) y + 5 = 2x
Y = 2x - 5
2) y = 7 - 2x
Y = -2x + 7
Point of intersection is (3,1) on the graph attached
To check algebraically:
2x - 5 = -2x + 7
4x = 12
X = 3
Substitute to get y
Y = 2x - 5
Y = 2 x 3 - 5
Y = 1
Therefore (3,1)
Option A
The solution set of the equation is {-12, -2}
<h3><u>Solution:</u></h3>Given equation is:
We have to find the solution set of this equation by completing the square
First, rearrange the equation so that only zero will be on the right side:
----- eqn 1
<em><u>The general form of quadratic equation is:</u></em>
where
On comparing the given eqn 1 with general quadratic equation, we get
a = 1
b = 14
c = 24
In completing the square, we take half of coefficient of middle term "x" and then square it. Then we add it on both sides of the equation
So to complete the square, add to both sides of the equation
Take square root on both sides
Now make two equations
x + 7 = + 5 and x + 7 = -5
x = +5 - 7 = -2
x = -2
And,
x + 7 = -5
x = -5 - 7 = -12
x = -12
Therefore, the solution set of the equation is {-12, -2} and option A is correct