2r+7+2n+n2
Because I combined the ones with like terms.
Answer:
90 seats are in row 19
Step-by-step explanation:
The pattern is adding 4 seats so 3 x 19 is 57 so 33 + 57 is 90 seats
Hope this helps
Answer:
Step-by-step explanation:

Answer: (-0.4, 6.8)
The graph is attached
Step-by-step explanation:
We can find the axis of symmetry using the formula x = -b/2a
x = - -4/2(-5)
x = 4/-10
x = 0.04
Substitute for x and calculate y
y = 
y = 6.8