Please help me (explain the why the answer is correct please)

b

Step-by-step explanation:

b is undefined bc remember that slope is rise/run

if the "run" is 0, then that makes it rise/0  and dividing by 0 is undefined

a has a positive slope bc it goes up from left to right

c has a negative slope bc it goes down left to right

d has a slope of zero -- and it makes sense bc the rise=0 and dividing zero by a nonzero number will equal zero

answer: option a.

step-by-step explanation:

you know that the quadrilateral opqr ( a four sided figure) is inscribed in circle. this means that all its vertices are on the circle.

then, by definition, the opposite angles of the quadrilateral are supplementary, this means that the sum of their measures is 180 degrees.

you can observe in the figure that the angles ∠opq   and the angle ∠orq   are opposite, therefore:

then, can be used to d to calculate the measure of ∠opq

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons