Which polynomial represents the sum below?

(-x4 + 4x3 + 1) + (4x3 + x + 2)

a. -x4 + 4x6 + x + 3
b. x8 + 8x7 + x + 3
c. -x7 + 8x6 + x + 7
d. -x4 + 8x3 + x + 3

Dakota earned $7.50 in interest in account a and $18.75 in interest in account b after 15 months. if the simple interest rate is 4% for account a and 5% for account b, which account has the greater principal? explain. to make it a little easier, there is an image. good luck!

Can some one explain this i got sent this. is this a threat i’m scared

Acube has a volume of 800 cubic inches. whatis the length of an edge of the cube, in inches? a. 23/100b. 43/50c. 83/100d. 1003/2e. 1003/8