Remember that

Thus, we can solve for x.
x + 22 = 90 - (2x - 7)
x + 22 = 97 - 2x
3x + 22 = 97
3x = 75
x = 25
Answer:
20
Step-by-step explanation:
Answer:
<h2>A. (0, 4)</h2>
Step-by-step explanation:
The equation of a circle:

(h, k) - center
r - radius
We have the equation:

h = 0, k = 4, r = 5
Answer:
6.3/2.5=2.52
Step-by-step explanation:
Answer:
B. Stratified sampling, because there are specific subgroups to investigate.
Step-by-step explanation:
Stratified Sampling is a sampling method and is used when the population has subgroups with different characteristics. Random sampling is applied in each of the sub-groups <em>proportional </em>to their size and then these samples <em>combined </em>together to create sample of the study.
Since there are three towns with people from different occupations ( retirees,business owners, office workers), it is better to use stratified sampling method.