Select the correct answer.
Samuel wants to conduct a customer satisfaction survey for his restaurant. He knows that he must randomly select a sample of his customers in
order to administer the survey, but he is uncertain about the sample size that is needed.
Which of the following must be true about Samuel's sample in order to produce a well-designed and well-conducted survey?
=
O A.
Samuel's sample should be chosen at random and be large enough to represent the entire customer population.
Samuel's sample should only be his regular customers.
OB.
0
C.
Samuel's sample should be chosen at random and be exactly one-half of his
custom
D. Samuel's sample must be the entire population of customers.

step-by-step explanation:

6.48/4 4 goes into 6.48 1.62 times

so firstly, we need to isolate the y variables to be able to solve these inequalities. firstly, add 0.5x on both sides of the first inequality and subtract 1.5x on both sides of the second inequality:

now since the slope is positive for the first inequality, this means that the line going upwards belongs to the first inequality, and the line going downwards belongs to the second inequality.

next, since y ≥ in the first inequality, this means that the shaded region will be above the first inequality's line, thus shading regions a and b.

next, since y ≤ in the second inequality, this means that the shaded region is going to be below this line, thus shading regions a and c.

since both lines shade region a, this means that region a is the solution.

step-by-step explanation:

mark brainliest!

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.

17

step-by-step explanation:

51/3=17

thus 17 is your answer.