Last question on my assignment and i have no idea how to do it! i really need .

310

Step-by-step explanation:

divide this figure into two rectangles, one with length of 3x-7 and width of x, the other one with length of 2x and 5x+2. plug x=5 into these, the first rectangle's area is 5*8=40, the second rectangle's area is 10*27=270. 40+270=310

the simplified form is

step-by-step explanation:

we want to simplify the expression,

let us change the middle bar to a normal division sign to obtain,

we multiply the first fraction by the reciprocal of the second fraction to obtain,

we factor to obtain,

we cancel the common factors to get,

we simplify to get,

the correct answer is b