Yep! They are all right! Great job, could write a bit better.... sorry
Answer:
Area = 
Step-by-step explanation:
Length of the given rectangle 'l' = (15 -
)
Width of the given rectangle 'w' = 
Area of the rectangle = lw
= 
= 
= 
Therefore, expression that defines the area of the given rectangle will be,
Area = 
It would be the last one because 5 columns are shaded and there are 10 columns all together. 50/100= 0.5
First we need to find the slope of line k. Using the slope formula, we fill in accordingly:

. The slope is -3/2. The slope of a line that is perpendicular to line k will have the opposite sign (so, positive) and will be the reciprocal of the line k's slope (so, 2/3). You could also say, more "mathematically legal", that the product of the slopes of perpendicular lines is -1, but it's easier to just say that they are opposite reciprocals. The slope you're looking for is 2/3. Choice 3 above.
37.
13 - 7 = 6
Her Mom Uses 6
38.
9 + 8 = 17
Andrew Had 17 Muffins