Find the sum of (8a+2b-4) and (3b-5)

Yolanda wanted to buy a total of 6 pounds of mixed nuts and dried fruit for a party she paid 21.60 for mixed nuts and 11.90 for dried fruit did yolanda but enough mixed nuts and dried fruit for the party

How much higher is checkpoint 4 than checkpoint 2 if checkpoint 4 is -143 and checkpoint 2 is -182

What is the value of x in the equation 15(x + 4) - 3 = 4.5(x - 2)?