Vertex is (-3 , 21 ) you can put <span>y=-2x^2-12x+3 in google and you will see the function</span>
The Number of boys in the class is: 18
Let's call "g" to the number of girls in the class.
The problem says that there is "w" fewer boys than girls, so we have:
g-w=18
Then, the number of girls in the class is:
g=18+w
Let's call "x" to the total number of studens in the class:
x=g+18
When we substitute g=18+w into x=g+18, we obtain:
x= (18+w)+18
The total number of studens in the class is:
x=w+36
X = 35
it is given in the figure that y = x = 35
so z = 180 - (35 + 35)
=> z = 180 - 70
=> z = 110 ..
=> option d is the correct one ....
Hope it helps !!!
Answer:A
Step-by-step explanation:becouse it makes sen e
