The diameter of circle S is 30 units, the diameter of circle R is 20
units, and DS = 9 units. Find CR.

4 Units

Step-by-step explanation:

A diameter is a line that passes through the center of  a circle thus dividing it into two semicircles. A radius is half of a diameter, a line drawn from any part of the circumference of the circle to the center of the circle.

Given that  the diameter of circle S is 30 units, the radius of the circle CS

= 30/2 units

= 15 unit

If DS = 9 units and from the circle, we know that

DC + DS = CS

DC = 15 - 9

= 6 Units

If the diameter of circle R is 20 units then the radius DR

= 20/2 units

= 10 units

but CR + DC = DR

Hence CR = 10 units - 6 units

= 4 Units

x+y = 29, 5x + 2y = 100

step-by-step explanation:

i'm guessing it was a multiple first option was the correct answer