Need help ASAP pls giving out extra pints for every question

1.
43.85 + 2(2.70) + 2(-1.10) - 4.45
43.85 + 5.40 - 2.20 - 4.45
$42.60
2.
1.40(15) = 21
$21
3.
15(3) + 3(9) + 7
45 + 27 + 7 = 79
$79
4.
15 - 45 / 9
15 - 5
10
5.
0.75(79.99)
$59.9925 (can be rounded to just $59.99)