Which of the following sets of ordered pairs is not a function?

a.
{(3, 2) (4, 2) (3, 7)}

b.
{(8, 6) (6, 1) (‒1, ‒1)}

c.
{(2, ‒7) (3, ‒7) (4, ‒7)}

d.
{(‒5, 8) (3, -8) (‒8, 3)}

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

Fred has a spinner that is split into four equal sections: red, blue, green, and yellow. fred spun the spinner 688 times. which of the following would be a good estimate of the number of times the spinner lands on the green section? a. 269 b. 603 c. 344 d. 189

Reinel saves 30% of every pay check. his paycheck last week was 560$. how much did reniel save last week?