At a children's show, 2/7 of the people attending were adults. The rest were children.2/5 of the children were boys. There were 120 girls attending the performance. A. How many children were there at the children's show?B. How many people were there at the children's show?

A. 200 Children

B. 280 People

Step-by-step explanation:

Let the total number of people attending the show be Y

Given that  2/7 of the people attending were adults, the number of adults A

A = 2/7 Y

Since the rest were children, the number of children C

C = Y - 2/7 Y

= 5/7 Y

2/5 of the children were boys, the number of boys B

B = 2/5 * 5/7Y

= 2/7 Y

The number of Girls G

G = 5/7 Y - 2/7 Y

= 3/7 Y

Given that there were 120 girls attending the performance

3/7 Y = 120

3Y = 120 * 7

Y = 120 * 7/3

= 280

The number of children in the shown C

= 5/7 * 280

= 200

The number of people at the show is Y = 280

3x^3-x^2+6x-9

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.