D, because it is the only one that contains multiples. All others contain factors.
If you have any doubts plz let me know.
Answer:40 square yards
Step-by-step explanation:
Given
Floor area A=10 square yards
Red tile costs 
per square yards
White tile costs 
per square yards
Total money spent=
on tiles
Suppose red tiles cover an area of 
square yards
So, we can write
Red tiles cover an area of 40 square yards
Answer:
736.05
Step-by-step explanation:699.00 x 5.3%=37.047
699.00 + 37.05 = 736.05
Answer:
Step-by-step explanation:
15 - x = 3x + 3
15 - x = 3•x + 3
4x = 12
x = 3
Sorry, I change the b and a into x's if that's fine with you.
Answer:
a = 16.733
Step-by-step explanation:
Since this is a right triangle, we can use the Pythagorean theorem
a^2 + b^2 = c^2
a^2 + 9^2 = 19^2
a^2 = 19^2 - 9^2
a^2 = 361-81
a^2 =280
Taking the square root of each side
sqrt(a^2) = sqrt(280)
a = 16.73320053
Rounding to the nearest thousandth
a = 16.733
