You can make an equation.
Let x=oranges
p=plums
n=apples
n= 3p + 5x
So basically we know 1 Apple means Sam will pack 3 plums and 5 oranges
To get 3n which means 3 apples we have to multiply the whole equation by 3
(n= 3p + 5x) x3
3n=9p+15x
So Sam will also put 9 plums and 15 oranges if he puts 3 apples in the box
It looks like you're given

Then by the additivity of definite integrals this is the same as

(presumably this is what the hint suggests to use)
Then by the fundamental theorem of calculus, we have

A. 2x3=6 and 6x12=72 so 78 is greater than 36
6+72=79 which is less than 90
Answer: if you simplify the equation, your answer should be 16
Step-by-step explanation: Simplify 2+22+22+2 to 444.
8÷2×48\div 2\times 48÷2×4
2
Simplify 8÷28\div 28÷2 to 444.
4×44\times 44×4
3
Simplify.
16