If a2+3a+1=c and −4a+5=d, which of the following is equal to c+d? A a2+a+6A squared plus A plus 6

B a2−a+6
A squared minus A plus 6, , ,

C a2+7a−4
A squared plus 7 A minus 4, , ,

D 6

Which statement is always true? a. square bcdf is a rectangle. b. rectangle gjkm is a square. c. quadrilateral stpr is a trapezoid. d. parallelogram abcd is a rhombus.

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

Find the value of x. also give me an explanation so i can complete it to other questions as well, : )