Answer:
√113
Step-by-step explanation:
8*8 + 7*7 = c^2
64 + 49 = c^2
√113 =C
Answer:
Explanation:
The <em>average</em> is the mean. It is calculated adding all the values and dividing the sum by the number of values (data):
For the students who took the test the day before you, you can write:
Where n is the number of students who took the test first.
Thus, when the average was 69 the equation is:
When you take the test, the n + 1, the new average is 70, and the sum of the scores raised in 95 points:
Now you have a system of two equation and two unknowns, so you can solve it.
Clear the sum of the scores from the first equation:
Subsitute in the second equation:
Solve for n:
Thus, when you include your self the number of students who took the test was 25 + 1 = 26.
6.3 x 10'-8
63 - 8
55
55 is the answer
Tan 2x = 2 tan x / (1-tan^2x)
hence, tan 2x = 1
2x = pi
x = pi/2.
Answer:
13b + 6= 18b
Step-by-step explanation: