Answer:
39. 32 - 4 = 28
28 ÷ 2 = 14
C. 14
40. D. 84%
I'm guessing 84% based on how the rectangles look on my phone. I would have to know the irl measurements to work the problem out.
41a. b = 86 ÷ (3 3/4 + 1 5/8)
41b. b = 86 ÷ (3 3/4 + 1 5/8)
b = 86 ÷ (3.75 + 1.625)
b = 86 ÷ 5.375
b = 16
Answer: 16 batches.
42. First let's find the width of the rectangle. Because the width = 1/2 the length, two widths equals (3.2a + 0.18b). Now, the two lengths will be this equation doubled- (6.4a + 0.36b). Now we add both together.
So, (8.6a + 0.54b) = 2Length + 2width = perimeter.
Therefore, Sarah's expression and reasoning was incorrect.
