Evaluate each expression (if x=7, y=15, and z=8) Problem 1: 3y X 40x - 1,000
Online, “*” is used to indicate multiplication to avoid confusion with “x” as an unknown.
3(15) * 40(7) -1000 = ?
To evaluate the expression 3y × 40x - 1,000, we substitute the given values of x, y, and solve the operation step by step.
Given: x = 7, y = 15, and z = 8
Step 1: Substitute the values of x and y into the expression:
3y × 40x - 1,000
= 3(15) × 40(7) - 1,000
Step 2: Simplify the expression inside parentheses:
= 45 × 280 - 1,000
Step 3: Perform the multiplications:
= 12,600 - 1,000
Step 4: Subtract:
= 11,600
Therefore, when x = 7, y = 15, and z = 8, the value of 3y × 40x - 1,000 is 11,600.