2x^2+3x-5x^2-1x First, combine alike variables and multiply the numbers next to an exponent. 4x+3x-5x^2-1x 7x-5x^2-1x 7x-25x-1x 7-25 is -18 -18x-1x= -19x
After we've combine all the like variables and used our exponents this is the answer that I've come to: -19x
You need to know the base to answer this. but if you want i will explain it divide 62.4 by 2 which is 31.2 the you divide 31.2 by what ever the base is and that is your height