Let $a_1,$ $a_2,$ $\dots,$ $a_n$ be real numbers such that \[a_1^2+2a_2^2+\cdots+na_n^2 = 1.\]Find the maximum value of $(a_1+2a_2+\cdots+na_n)^2.$

im guessing (23,14). hope this : )

umm you say your want to . but you do know that this is the mathematics.  

o~o

  d. △abc is congruent to △fde

step-by-step explanation:

triangle abc is reflected across the x-axis. the corresponding vertices are

the names of the triangles in the congruence statement must have corresponding vertices in the same order. that is, △abc is congruent to △fde.