Simplify the following expression: 2a - 3b - 4a + 2b

a
- 2a - b
b
a + b
c
2a + 4b
d
- a - 4b

The parking lot of a store has the shape shown. all angles are right angles. what is the area of the parking lot?

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

Mario has $14.35 left in his wallet. he spent $148.43 for tablecloths. then, he spent $92.05 for napkins. how much money did mario have in his wallet to start with?