Given data:
The numbers of books read by Greta are 2.
The expression for the given statement is,
1 month = 2 books
Multiply the above expression by 16 onn both sides.
16(1 month)=16(2 books)
16 months= 32 books
Thus, 32 books read by Greta in 16 months.
Your plane is 3x-y+4z=32 and you want to know when it crosses the z-axis or in other words intersects it. Along the z axis only z changes, additionally it goes through the origin (0,0,0).
So we can insert x=y=0 into the plane to calculate the point along the z-axis where it intersects the plane:
3x-y+4z=32
insert 0s:
4z=32
z=8
so the solution plane intersects the z-axis at (0,0,8)
15% of 38.75 is approximately 5.81.
A 15% tip would be $5.81.
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