Can someone help me please it’s due in 3mins

1920

Step-by-step explanation:800+1120=1920 Formula:

Divide into 2 cubes. 1 cube are equals base times width times height. 8*10*10=800 1 square equals 800. 14*8*10=1120. add 800 and 1120 to get 1920

If the number is represented by x, then its square is x². The "sum of a number and its square" will be x + x². "Is 42" means this sum is equal to 42, so we have
  x + x² = 42

Of course, the addition is commutative, so we can rearrange the order to
  a. x² + x = 42