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Answer:
f(-4)= -55
Step-by-step explanation:
We want to find f(x), or y, when x is equal to -4.
Therefore, we can substitute -4 in for x in the function.
f(x) = -2x^2 + 4x - 7
Substitute -4 in for x
f(-4) = -2(-4^2) + 4(-4) - 7
Evaluate the exponent
f(-4)=-2(16)+4(-4)-7
Multiply -2 and 16
f(-4)= -32+4(-4)-7
Multiply 4 and -4
f(-4)=-32-16-7
Subtract
f(-4)=-55
Answer:
1400
Step-by-step explanation:
Given: Cost of Regular ticket = $9.50
Cost of Matinee tickets= $7
Total number of people= 5000
Total spending in watching movie= $44000.
Lets assume total number of people attended matinee be "x".
∴ Number of people attended Regualr show= 
We know, total cost= 
Now, forming an equation to show total spending on tickets.
⇒ 
Using distributive property of multiplication to multiply 9.50 with 5000 and -x.
⇒ 
⇒ 
Adding both side by 2.5x
⇒ 
subtracting both side by 44000
⇒ 
Dividing both side by 2.5
⇒
∴
Hence, number of people attended the matinee show are 1400.