The mean of nine test scores is 61%. if a score of 71 is added to the group of scores, what is the new mean?

answer is the third choice:

3x^5+4x^4+x^3+2x^2-10x-7=0

step-by-step explanation:

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,

the answer is two. hope this !

the answer for this is 0.25 km. : )