What is the radius of this circle if the circumference is 18 cm?
C=18 cm
3 cm
9 cm
18 cm
36 cm

r=2.86

Step-by-step explanation:

The formula for the circumference of a circle is 2 times pi times the radius (2πr).

Set that equal to the number the problem gives you, and you see:

2πr=18 cm

Now solve for the radius by doing the opposite of what pi and 2 are doing mathematically with the r. (They are both multiplying by r, so we divide both sides of the equation by them to ‘move’ them off the left side of the equation.)

First divide each side by 2, and you get:

r=9 cm

d

step-by-step explanation:

by observation, we can see that the the graph is simply the graph of y = |x| that has been shifted 4 units downwards and 3 units to the left.

we can recognize in choice d :

y = | x + 3 |   - 4 (rewriting in general form)

y = | x - (- 3) |   - 4

the "-4 " term means   that the graph has been shifted by 4 units in the negative y direction

the "-3 " term means   that the graph has been shifted by 3 units in the negative x direction

this matches our observation of the graph described above.

answer: 1 + 1 = 11

step-by-step explanation: