What is the median of the ages in this stem-and-leaf plot?
2 answers:
Answer:
B. 45
Step-by-step explanation:
We have been given a stem and leaf plot and we are asked to find the median age for our given plot.
We can represent the data provided by stem and box plot as:
22, 23, 29, 31, 34, 36, 38, 40, 43, 45, 47, 48, 49, 53, 57, 58, 62, 63, 65.
We can see that our data set has 19 data points, so median age will be:
We can see that 10th data point of our data set is 45, therefore, median age is 45 and option B is the correct choice.
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Answer:
x = ± 1 , x = ±
Step-by-step explanation:
Let u = x² , then
- 3x² + 2 = 0 , can be expressed as
u² - 3u + 2 = 0 ← in standard form
(u - 1)(u - 2) = 0 ← in factored form
Equate each factor to zero and solve for u
u - 1 = 0 ⇒ u = 1
u - 2 = 0 ⇒ u = 2
Change the variable u back to x
x² = 1 ( take square root of both sides )
x = ± 1
or
x² = 2 ( take square root of both sides )
x = ±