The slope of that line is “undefined”. The slope of horizontal lines are 0 and the slope of vertical lines are undefined.
Given
The parallelogram,
To find the area of the parallelogram.
Explanation:
It is given that,
The base of the parallelogram is 10 inches.
And, the height of the parallelogram is 5 inches.
Therefore,

Hence, the area of the given parallelogram is 50 in^2.
3x+4=52
-4 -4
3x=48
divide by 3 on both sides
x=16
Answer:
Part 9) The number of items on Emily's grocery list is 5 and the number of items on Bobby's grocery list is 13
Part 10) The height of the taller bookshelf is 4 feet and the height of the shorter bookshelf is 1 foot
Step-by-step explanation:
Part 9)
Let
x ----> number of items on Emily's grocery list
x ----> number of items on Bobby's grocery list
we know that
----> equation A
----> equation B
Solve by substitution
Substitute equation A in equation B

solve for x



Find the value of y

therefore
The number of items on Emily's grocery list is 5 and the number of items on Bobby's grocery list is 13
Part 10)
Let
x ----> the height of the taller bookshelf in feet
y ----> the height of the shorter bookshelf in feet
we have
----> equation A
Remember that

To convert inches to feet divide by 12
so

----> equation B
Solve the system by substitution
substitute equation A in equation B
solve for y
Find the value of x

therefore
The height of the taller bookshelf is 4 feet and the height of the shorter bookshelf is 1 foot