PLEASE HELP

this is worth 20 POINTS

GEOMETRY:

Rectangle ABCD contains a point X such that AX = 1, BX = 7, and $CX = 8. Find DX.

**MOST CORRECT AND THOROUGH ANSWER WILL GET BRAINLIEST ANSWER**

Aformual for 8 bottles of window cleaner calls for 6 cups of rubbing to customers alcohol 2 1/4 gallons of water and 1 1/2 cups of ammonia alcohol would the forula call if a factory made 1,280 bottles for stores to sell to customers

Can someone me and plz do the problem

What is the total area of the figure?