Answer:
see below
Step-by-step explanation:
-2x^2-3=11
add three
-2x^2=14
divide by 2
x^2=7
Answer:
x = 5
Step-by-step explanation:
60 + 42.95x = 25 + 49.95x
60 + 42.95(5) = 25 + 49.95(5)
42.95 * 5 = 214.75
214.75 + 60 = 274.75
49.95 * 5 = 249.75
249.75 + 25 = 274.75
Hope this helped!:))
Answer:
B - y = 2x - 8
Step-by-step explanation:
Step 1: find slope
2x + 4y = 6
4y = -2x + 6
Make y the subject of the formula
y =( -2x + 6)/4
We can separate to get the slope
y = -2x/4 + 6/4
y = -x/2 + 3/2
Slope m = -1/2
Step 2: using a point slope form equation
y - y1 = m ( x - x1)
Note: if two lines are perpendicular to the other, it is always a negative reciprocal of each other
ie m = 2
Substitute m into the equation
y - y1 = 2(x - x1)
Step 3: sub the point
( 6 , 4)
x1 = 6
y1 = 4
y - 4 = 2( x - 6)
Step 4 : using a slope intercept form equation
Open the bracket
y - 4 = 2x - 12
y = 2x - 12 + 4
y = 2x - 8
The equation of a line is
y = 2x - 8
