Answer:
Marginal relative frequency is the ratio of the sum of the joint relative frequency in a row or column and the total number of data values. ... Conditional relative frequency numbers are the ratio of a joint relative frequency and related marginal relative frequency
It would be c.13 and a trick for this is to add the negative and positive number to get how much space is in between
Step-by-step explanation:
if you're looking for x
x=180-42-51= 87°
and if you're looking for D
D= 180-42= 138°
The first step in his proof should be the givens if they are provided to you. If they aren't when solving a proof, I like to look for stuff that i know is congruent in the pictures and then using theorems and postulates complete the proof.