Question

expression for surface area of attic: 45 (40 + 25 + 25) + \frac{1}{2}(40 \times 15)
click the arrows to choose an answer from each menu to explain your reasoning.
the net linda drew is choose... . the first term of lindas expression, 45 (40 + 25 + 25), choose... . the second term of lindas expression, \frac{1}{2}(40 \times 15), is choose... . the surface area of lindas attic is choose... square feet.

Explanation:

Step1: Simplify the first - term

First, simplify the sum inside the parentheses in the first term $45(40 + 25+25)$. $40 + 25+25=90$, so the first term becomes $45\times90 = 4050$.

Step2: Simplify the second - term

Next, simplify the second term $\frac{1}{2}(40\times15)$. First, $40\times15 = 600$, then $\frac{1}{2}\times600=300$.

Step3: Calculate the total surface area

Add the two simplified terms together. $4050 + 300=4350$.

Answer:

4350