Which ones are functions?

13. no 14. yes 15. yes

Step-by-step explanation:

13 doesn't pass vertical line test

14 does pass vertical line test

15 none the numbers share the same for example if it was (0,12) and (-3,12) it would not be a function because they both have 12 as their y.

answer with step-by-step explanation:

a. ∠j is supplementary to ∠k - true:

(opposite angles of a trapezoid are supplementary which means that they add up to 180 degrees)

b. kl is parallel to jm - true:

(opposite sides are parallel to each other in a trapezoid)

c. jk is perpendicular to kl - false:

(clearly, jk does not make a right angle with kl)

d. jk is parallel to lm - false:

(jk and lm are two lines opposite in direction to each other so they cannot be parallel)

e. ∠j is congruent to ∠m - true:

(the angles on each side of the base are congruent)

f. ∠j is congruent to ∠k - false:

(the angles on the same side but opposite side of the base are not congruent)

d.) yes, because the volume of the cone is greater than the volume of the sphere

step-by-step explanation: