If the line is tangent to circle at point A and the radius ( suppose AO) has a slope of 2.5 then a slope of the tangent line is :
Explanation: The product of slopes of two perpendicular lines is -1. To get second slope we have to divide -1 by the first one.
Answer:
C) - 0.4
Answer:
23x+2
Step-by-step explanation:
4*5=20
20*x=20
3x+20x=23x
23x+2
Answer:
- 26 ounces of 55% solution
- 104 ounces of 80% solution
Step-by-step explanation:
Let x represent the quantity of 80% solution. Then 130-x is the amount of 55% solution. The total amount of salt in the mix is ...
0.80x +0.55(130 -x) = 0.75·130
0.25x = 0.20·130 . . . . . . . subtract 0.55(130)
x = 0.20/0.25(130) = 104
130-x = 26
She should use 26 ounces of 55% solution and 104 ounces of 80% solution.
to find the inverse of the function exchange x and y and then solve for y
y = 5 / sqrt (x)
x = 5 / sqrt(y)
multiply by the sqrt(y)
x * sqrt(y) = 5
divide by x
sqrt(y) = 5/x
square both sides
y = (5/x) ^2
y = 25/x^2
The inverse of 5 / sqrt (x) is 25/x^2
In the plane, we have everywhere. So in the equation of the sphere, we have
which is a circle centered at (2, -10, 0) of radius 4.
In the plane, we have , which gives
But any squared real quantity is positive, so there is no intersection between the sphere and this plane.
In the plane, , so
which is a circle centered at (0, -10, 3) of radius .