Robert is preparing a poster-board presentation. He wants to make a decorative pattern with 10 squares to fill part of the poster. The area of the poster board is 720 square inches. To find how much space Robert will have left for his presentation if he uses squares with 7-inch sides, evaluate 720 − 10s2 when s = 7 .(1 point)

Question

Robert is preparing a poster-board presentation. He wants to make a decorative pattern with 10 squares to fill part of the poster. The area of the poster board is 720 square inches. To find how much space Robert will have left for his presentation if he uses squares with 7-inch sides, evaluate  720 − 10s2  when  s = 7 .(1 point)
Responses

580 square inches
580 square inches

9,940 square inches
9,940 square inches

230 square inches
230 square inches

34,790 square inches

GPT-4 Turbo · Accepted Answer

To calculate how much space Robert will have left for his presentation after using squares with 7-inch sides, we need to substitute the value of s=7 into the expression 720 - 10s^2.

First, calculate the area of one square:
s^2 = 7^2 = 49 square inches

Since Robert is using 10 squares:
10 * s^2 = 10 * 49 = 490 square inches

Now subtract the area occupied by the squares from the total area of the poster:
720 - 10s^2 = 720 - 490 = 230 square inches

So Robert will have 230 square inches of space left on his poster-board presentation.