Brainliest! multiple choice easy !
identify the type of sample used.
a computer generates a random list of telephone numbers to call to survey people about telephone fees.
a) convenience
b) simple random
c) stratified random
d) systematic

C.) Stratified random

Step-by-step explanation:

Definitions:

C.)Stratified random sample: The population is first split into groups. The overall sample consists of some members from every group. The members from each group are chosen randomly.

A.) Convenience sample: The researcher chooses a sample that is readily available in some non-random way.

B.) Simple random sample: Every member and set of members has an equal chance of being included in the sample. Technology, random number generators, or some other sort of chance process is needed to get a simple random sample.

D.) Systematic random sample: Members of the population are put in some order. A starting point is selected at random, and every ninth member is selected to be in the sample.

Hope this helps : )

the sum of all the angles in a triangle are equal to 180

so you can add   the 3 given angles together to equal 180:

5y + 2y + 2y = 180

or since all three angles have the same letter, combine the 3 angles to equal 180:

9y = 180