I assume that you mean 3 times 5 feet means how many feet and inches
so the answer is 5 feet and <u>blank </u> inches
or 12 inch in 1 feet so 12 times 5=60 so 60 inches
or you may have forgotton to put a number before the first inch word like 5 feet <u>3</u> inch
when you have a linear combination for example 3x + 2y equals negative 4 you adieu like terms and then multiply
5 he used 5 hours or however it is out but it’s “5”
(3x^5 + 8x^3) - (7x^2 - 6x^3) = 3x^5 + 8x^3 - 7x^2 - 6x^3 = 3x^5 + 2x^3 - 7x^2
8.4/4.8=y/14.4
y=25.2
Here is the answer