If an image of a triangle is congruent to the pre-image, what is the scale factor of the dilation?

If the endpoints of the diameter of a circle are (8, 6) and (2,0), what is the standard form equation of the circle? a) (x + 5)2 + (y + 3)2 = 18 (x + 5)2 + (y + 3)2 = 3.72 (x - 5)2 + (y - 3)2 = 18 d) (x - 5)2 + (y - 3)2 = 32

Is there an x intercept in the equation 60*1.15^x

The difference of two numbers is 40. find the numbers if 0.3 parts of one number is equal to 37.5% of the other one.