This circle is given in standard form
, where
is the ordered pair for the center of the circle.
Notice that in the equation, we have
and
. When writing the ordered pair alone, we have to remember to flip the sign.
Therefore, we have
.
Answer:
No they don't show direct variation because if you get y alone, the equation you get is in slope intercept form instead of direct variation.
Step-by-step explanation
direct variation: y=kx
y-x=4
+x +x
y= 4+x
Not Direct Variation
Answer:
z° is 26°.
Step-by-step explanation:
As the angles are complementary, as stated in your problem:
Y=kx, k is not equal to 0
when y=56, x=7, 56=7k
k=8
so the equation is y=8x
Answer:
No real solutions
Step-by-step explanation:
Use the discriminant to determine the number of real solutions to a quadratic equation.
The general form for a quadratic equation is ax² + bx + c
The discriminant is b² - 4ac
The following 3 rules apply...
1. If b² - 4ac > 0, then there are 2 real solutions
2. If b² - 4ac = 0, then there is one real solution
3. If b² - 4ac < 0 then there are no real solutions
For this problem,
a = 5
b = 6
c = 4
Plug them into b² - 4ac....
6² - 4(5)(4)
36 - 80
-54 so b² - 4ac < 0 , there are no real solutions
