Question

What is the result of this expression (in scheme)?(let ((x 10)

(y 10))
(- (* x y) y))

A) 55
B) 50
C) Error: Unable to Compute Value
D) 90

Answer 1

The result of the Scheme expression (let ((x 10) (y 10)) (- (* x y) y)) is 90, which is obtained by multiplying x and y and then subtracting y from the product.

option d is the correct.

Step-by-step explanation:

The expression in question is a scheme programming example. It uses the let expression to bind the values 10 to variables x and y. It then calculates the multiplication of x and y and subtracts y from the result. Here's the step-by-step evaluation:

1. The value of x is 10.
2. The value of y is also 10.
3. The product of x and y is calculated as 10 * 10, which equals 100.
4. Then, from this result, y (which is 10) is subtracted: 100 - 10, resulting in 90.

Therefore, the result of the expression (let ((x 10) (y 10)) (- (* x y) y)) is 90.