evaluate the expression 5x^2+2y when x=-3 and y=20
To evaluate the expression 5x^2+2y when x=-3 and y=20, substitute the given values into the expression:
5(-3)^2 + 2(20)
Simplify:
5(9) + 40 = 45 + 40 = 85
Therefore, when x=-3 and y=20, 5x^2+2y equals 85.
To evaluate the expression 5x^2 + 2y when x = -3 and y = 20, we substitute the given values into the expression:
5(-3)^2 + 2(20)
Simplifying the expression further:
5 * 9 + 40
45 + 40
85
Therefore, when x = -3 and y = 20, the expression 5x^2 + 2y evaluates to 85.
To evaluate the expression 5x^2+2y when x=-3 and y=20, follow these steps:
Step 1: Replace the variable x with the value -3 in the expression.
5(-3)^2 + 2y
Step 2: Simplify the expression inside the parentheses.
5(9) + 2y
Step 3: Multiply 5 by 9.
45 + 2y
Step 4: Replace the variable y with the value 20.
45 + 2(20)
Step 5: Multiply 2 by 20.
45 + 40
Step 6: Add the two numbers together.
85
Therefore, when x = -3 and y = 20, the expression 5x^2+2y evaluates to 85.