Answer:
25
Step-by-step explanation:
We know that the standard error of the sampling distribution of sample means is
Standard error=standard deviation/√n
√n=standard deviation/Standard error
n=(standard deviation/Standard error)²
We are given that standard deviation=5 and standard error=1. So,
n=(5/1)²
n=5²
n=25.
Thus, the required sample size is 25.
Answer:
1
Step-by-step explanation:
56.52 inches because 18 is the diameter and 18 times 3.14 is 56.52
(-2m + 5n)²
(-2m + 5n) (-2m + 5n)
-2m(-2m + 5n) + 5n(-2m + 5n)
4m² - 10mn - 10mn + 25n²
4m² - 20mn + 25n²
4m²⇒ -2m * -2m
-20mn ⇒ 2(-2m)(5n)
25n² ⇒ 5n * 5n
<span>C. 4m² − 20mn + 25n²; a perfect square trinomial</span>
Answer:
A=5, B=10 and C=15
Step-by-step explanation:
-We are given that:
-Also, given that:
From equation i, we have that:
#we substitute A=15-B in equation ii to solve for B:
Hence, the values of our unknowns are A=5, B=10 and C=15