K kanman New member Joined Dec 5, 2010 Messages 1 Dec 5, 2010 #1 Describe the possible values of x if the are of the rectangle is at least 40 square inches the rectangle has a width of 4 the length is 5/8x + 5 My answer which was wrong was 4/1(5/8x)= 5/2 x 2/5 8/1 x 2/5 = 16 in x is greater than or equal to 16
Describe the possible values of x if the are of the rectangle is at least 40 square inches the rectangle has a width of 4 the length is 5/8x + 5 My answer which was wrong was 4/1(5/8x)= 5/2 x 2/5 8/1 x 2/5 = 16 in x is greater than or equal to 16
D Deleted member 4993 Guest Dec 5, 2010 #2 kanman said: Describe the possible values of x if the are of the rectangle is at least 40 square inches the rectangle has a width of 4 the length is 5/8x + 5 My answer which was wrong was 4/1(5/8x)= 5/2 x 2/5 8/1 x 2/5 = 16 in x is greater than or equal to 16 Click to expand... \(\displaystyle 4 * (\frac{5x}{8} + 5) \ge 40\) \(\displaystyle 20x/8 + 20 \ge 40\) \(\displaystyle 5x/2 \ge 20\) \(\displaystyle 5x/2 * (2/5) \ge 20*2/5\) \(\displaystyle x \ge 8\)
kanman said: Describe the possible values of x if the are of the rectangle is at least 40 square inches the rectangle has a width of 4 the length is 5/8x + 5 My answer which was wrong was 4/1(5/8x)= 5/2 x 2/5 8/1 x 2/5 = 16 in x is greater than or equal to 16 Click to expand... \(\displaystyle 4 * (\frac{5x}{8} + 5) \ge 40\) \(\displaystyle 20x/8 + 20 \ge 40\) \(\displaystyle 5x/2 \ge 20\) \(\displaystyle 5x/2 * (2/5) \ge 20*2/5\) \(\displaystyle x \ge 8\)
