Your answer in the picture is right!
Answer:
B) $30.87
Step-by-step explanation:
28.45*0.085=2.41825
When rounded to the nearest cent, you get 2.42.
28.45+2.42=30.87
The total cost after tax is $30.87.
Is that the full question or does it say like a certain percent of $12.90 was color or?
8x^2+6x^2+4x=138 combine like terms on left side
14x^2+4x=138 since the number of seats in the from row is just 4x, subtract 14x^2 from both sides
4x=138-14x^2 that would be the general solution, if you wanted the actual number you would have to solve for x and then multiply that value by 4 to know what "4x" is...
14x^2+4x-138=0
14x^2-42x+46x-138=0
14x(x-3)+46(x-3)=0
(14x+46)(x-3)=0
2(7x+23)(x-3)=0, since x>0
x=3 and thus
4x=12 seats
So there are 12 seats in the front row addition.
