Tangerine trees yield 50 pounds of fruit per acre.
Grapefruit trees yield 75 pounds of fruit per acre.
Let the number of acres of tangerine = x
And the number of acres of grapefruit = y
The total produced of fruit = 1,500
The equation which represents the total fruits of tangerine and grapefruit is:
50 x + 75 y = 1500 →→(1)
Now, to answer the given question, Is it possible for Sheila to have 15 acres of tangerine trees and 10 acres of grapefruit trees?
∴ x = 15 and y = 10
By substitution in (1) with x and y
∴ 50 * 15 + 75 * 10 = 750 + 750 = 1500
Which is agree with the total produced from Sheila's orchard.
So, the answer is :
Yes, it is possible for Sheila to have 15 acres of tangerine trees and 10 acres of grapefruit trees.