Answer:
Expansion for there will be 9 terms.
(a+b) ^n =nco a^n b^o+ nc1 a^(n-1) b^1+nc2 a^(n-2) b^2+nc3 a(n-3) b^3+nc4 a^(n-4) b^4+...........................ncn a^o b^n.
5th term of (2x+y)^8 = ?
5th term is nC4 a^(n-4) b^4
a=2x, b=y, n=8
therefore 8C4 (2x)^(8-4) (y)^4
8!/((8-4)! 4!) (2x)^4 y^4
40320/576 (16 x^4 ) (y^4)
70 (16x^4)(y^4)
1120 X^4 Y^4
Step-by-step explanation:
Solution: An educator wants to determine whether a new curriculum significantly improves standardized test scores for students. she randomly divides 70 students into two groups. group 1 is taught using the new curriculum, while group 2 is taught using the traditional curriculum. at the end of the school year, both groups are given the standardized test and the mean scores are compared. determine whether the sampling is dependent or independent. indicate whether the response variable is qualitative or quantitative
Answer: The given sampling is independent.
And the response variable is quantitative.
Step-by-step explanation:
answer is explained above
Answer:D
Step-by-step explanation: