Answer: A -11
Step-by-step explanation:
its quite simple
subract 9(-) from negative 2
30% percent is what they marked up
Use the pythagorean theorem A²+B²=C²
Use 21ft for A
Use 14ft for B
Then solve for C (the diagonal)
21²+14²=C²
441+196=C²
673=C²
√<u />673 = √C²
C≈25.24 or if you leave in radical form it is the square root of 637
0.732
0.750
If you have trouble with decimals, then multiply both numbers by a constant number to get rid of the decimals. In this case, we would multiply by 1000.
0.732 x 1000 = 732
0.750 x 1000 = 750
Obviously, 750 is bigger than 732. Therefore, 0.75 is bigger than 7.32.
By the way, this is a property:
If

, then
14 divided by 20 is 0.7
Multiply that by 100
The answer is 70%