5x+2y = 20
For every hardcover book (x) you will be charged 5$.
For every paperback book (y) you will be charged 2$.
The amount of both types of books you buy has to be under or equal to 20$
The age of the person is 36 :) hoped this helped
Lets say the number of adult tickets is x. This means the number of student tickets is 2x. So, 2x + x = 285, or 3x =285. The means x = 95. So the number of adult tickets sold is 95.
There must be 2 lines on every plane because you need a y-axis and an x-axis.
Hey there :)

↓ Is the same as

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Since it is a division by fraction, we can multiply by what is called the reciprocal
( The attached picture might help you )
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↓ For this part, we need the common denominator, which is 6

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Your final answer