Simplify the following expression. 3x^4+ 2x^3 - 5x^2 + 4x^2 +6x-2x - 3x^4 + 7x^5 - 3x^3

A. 7x^5– x^3 - x^2 + 4x
B. 7x^5 +6x^4 - x^3- x^2 +4x
C. 7x^5- 6x^4 +5x^3 - x^2 + 4x
D. 10x^4+ x^3 +
+ x^2 + 4x

The ratio of two numbers is 5 to 4. the sum of the numbers is 99. what number is the greater of the two numbers?

Last year, a state university received 3,560 applications from boys. of those applications, 35 percent were from boys who lived in other states. part a)how many applications did the university receive from boys who lived in other states? part b)applications to the university from boys represented 40percent of all applications. how many applications did the university receive in all? i don't how to do part b so me and plz tell how you got your answer

Twenty points. suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet