1. Figure ABCD is similar to figure WXYZ. Which proportion must be true for these figures?
w
B
с
A
D
A
AB ZW
BC WZ
B.
BD ZY
DC XY
C
AB WX
DCZY
D.
DA CD
ZY XY
OA
OB
Ос
OD

Heather is riding a quadratic function that represents a parabola that touches but does not cross the x-axis at x=-6

The ratio of the height of two similar cylinders is 4 to 3 what is the ratio of their volumes

Exercise: counting committees 0.0/2.0 puntos (calificable) we start with a pool of n people. a chaired committee consists of k≥1 members, out of whom one member is designated as the chairperson. the expression k(nk) can be interpreted as the number of possible chaired committees with k members. this is because we have (nk) choices for the k members, and once the members are chosen, there are then k choices for the chairperson. thus, c=∑k=1nk(nk) is the total number of possible chaired committees of any size. find the value of c (as a function of n ) by thinking about a different way of forming a chaired committee: first choose the chairperson, then choose the other members of the committee. the answer is of the form c=(α+nβ)2γn+δ. what are the values of α , β , γ , and δ ?