triangles abd, cbd and adc are all isosceles. find the angle x.
ac = ad

Angle BDA=x

Sum of int. angles=opp. ext. angle

Angle CBD=2x

Angle BCD=2x

Angle CDB=180-4x

Angle BCD=BDC

So, 2x=180-4x+x

x=36°

option a.

step-by-step explanation:

if you look closely at the graph, we can notice that the function is not defined at two different points.

if you look at functions b and c, you will notice that both functions are not defined at just one point. the function b is not defined at x= -5/2 and function c is not defined at x=-5. both options are discarded, given that our function should not be defined at two fiferent points.

now, if you look closely at the graph you will notice that the function sketched is not defined at x=5 and x=-2.

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls