A.) 200cm
B.) 206cm
A explanation.) To find the mean, you add all the heights and divide by 5 (how many numbers there are), this gives you 1000 divided by 5, which equals exactly 200cm.
B explanation.) I tried the equation with numbers higher than 202, going up one each time, and 206 was the one that equaled exactly 201.
2n - 5 = 7
Add 5 to both sides.
-5 + 5 = 0
7 + 5 = 12
2n = 12
Divide both sides by 2.
2n / 2 = n
12 / 2 = 6
n = 6.
Your answer is 6.
I hope this helps!
Answer:
11.8 =x
Step-by-step explanation:
Since this is a right triangle, we can use trig functions
cos theta = adj/ hyp
cos 25 = x/ 13
13 cos 25 =x
11.78200123 =x
11.8 =x
4b×3b-2b=102
12b^2 - 2b = 102
12b^2 - 2b - 102 = 0
divide by 2
6b^2 - b - 51
(6b + 17)(b - 3) = 0
6b + 17 = 0
6b = -17
b = -17/6 or 2 5/6
b - 3 = 0
b = 3