Answer:
D. 2 1/4.
Step-by-step explanation:
First, convert both -5 1/4 and -7 1/2 into improper fraction. These would be -21/4 and -15/2.
-21/4 - (-15/2)
Two negatives in a row make a positive.
-21/4 + 15/2
Double both the numerator and denominator of 15/2 to make it have the same denominator as -21/4. This would 30/4.
-21/4 + 30/4
Put -21 + 30 over 4 to make it a single fraction.
(-21 + 30)/4
Add -21 and 30 to get 9.
9/4
Convert 9/4 into a mixed number: 2 1/4
The answer to -5 1/4 - (-7 1/2) is 2 1/4, which is D.
Answer:
x = 11/4 or 2.75
Step-by-step explanation:
Perimeter: 43
Perimeter: L + L + W + W
L = 4x + 3
W = 2x + 2
(4x + 3) + (4x + 3) + (2x + 2) + (2x + 2) = 43
4x + 4x + 2x + 2x + 3 + 3 + 2 + 2 = 43
8x + 4x + 6 + 4 = 43
12x + 10 = 43
12x = 43 - 10
12x = 33
12x/12 = 33/12
x = 33/12
What is the question as I think those are answer choices?
Answer:
70 pages
Step-by-step explanation:
Since Daniel has read 70% of the book he has 100% - 70% or 30% of the book left to read. This 30% is 21 pages. We can write this equation, where x is the number of pages in the book:
0.3x = 21
(0.3 is equivalent to 30%)
We divide by 0.3 on both sides of the equation to get:
x = 70 pages