evaluate the expression 5x^2+2y answer in decimal form

Question

x=-3
y=0.25

Answer 1

To evaluate the expression \( 5x^2 + 2y \) with \( x = -3 \) and \( y = 0.25 \), we start by substituting the values of \( x \) and \( y \) into the expression.

1. Calculate \( x^2 \): \[ x^2 = (-3)^2 = 9 \]

2. Multiply by 5: \[ 5x^2 = 5 \times 9 = 45 \]

3. Multiply \( y \) by 2: \[ 2y = 2 \times 0.25 = 0.5 \]

4. Add the results together: \[ 5x^2 + 2y = 45 + 0.5 = 45.5 \]

Thus, the final result is: \[ \boxed{45.5} \]