Let x = number of adult tickets, and y = number of children tickets. One equation must deal with the number of tickets, and the other equation must deal with the revenue from the tickets.
Then x + y = 300 is the number of tickets
12x + 8y = 3280 is the revenue from the tickets.
Using the substitution method:
x + y = 300   ⇒   y = 300 - x   ⇒   Equation (3)
12x + 8y = 3280   ⇒   12x + 8(300-x) = 3280   ⇒   x = 220
y = 300 - x   ⇒   y = 300-220 ⇒ 80
Therefore 220 adult tickets and 80 children's tickets were sold. 
        
             
        
        
        
14. The equation would be -16t^2+60t+7 To find the maximum point plug in values into the equation -b/2a to find the axis of symmetry, and plug that number in for t. 
b=60, a=-16
-60/-32=t=1.875
-16(1.875)^2+60(1.875)+7=63.25
Maximum point: (1.875,63.25)
The ball will land after about 3.86 seconds
        
             
        
        
        
Answer:
f(-3) = 9
Step-by-step explanation:
Step 1: Define
f(-3) = x = -3
f(x) = x²
Step 2: Substitute and Evaluate
f(-3) = (-3)²
f(-3) = 9
 
        
             
        
        
        
Answer:
The length of the rectangle is 18 cm
The width of the rectangle is 6 cm
Step-by-step explanation:
Let
x-----> the length of the rectangle
y----> the width of the rectangle
we know that
The perimeter of the rectangle is 

we have

so
 ------> equation A
 ------> equation A
 ------> equation B
 ------> equation B
Substitute equation B in equation A and solve for y
48=2(2y+6+y)
48=2(3y+6)
48=6y+12
6y=48-12
y=36/6=6 cm
Find the value of x
x=2(6)+6=18 cm
The area of the rectangle is
A=xy
A=18*6
A=108 cm^2
 
        
             
        
        
        
Answer:
yes
Step-by-step explanation:
yes