Answer:
-72.
Let me know if this helped and please brainliest!
Step-by-step explanation:
The equation of a circle in standard form:
(h, k) - center
r - radius
The center is a midpoint of MN. The formula of a midpoint:
We have M(2, 4) and N(9, 4). Substitute:
Therefore we have the center (5.5, 4) → h = 5.5 and k = 4.
The radius of a distance between the center and M.
The formula of a distance between two points:
We have the points (5.5, 4) and (2, 4) Substitute:
Substitute to the equation of a circle:
Answer:
x=60
Step-by-step explanation:
Straight line with angles equal 180 degrees so 180-120=60
Answer:
212.50
Step-by-step explanation:
Let
x
be the amount in her savings to begin with. Since she used 40% of her savings to pay for the $85 bike, that means that
0.4
x
=
85
. Therefore
x
=
85
0.4
=
212.5
. The answer is $212.50.
Answer:
The equation is y = -2/5x + 4
Step-by-step explanation:
First we have to find the slope of the line. In order to do so, solve the first equation for y.
2x + 5y = 20
5y = -2x + 20
y = -2/5x + 4
This gives us a slope of -2/5. Given that information, we now can plug the slope and point into point-slope form and get the final equation.
y - y1 = m(x - x1)
y - 6 = -2/5(x - -5)
y - 6 = -2/5(x + 5)
y - 6 = -2/5x - 2
y = -2/5x + 4