Order of Operations are PEMDAS. So, based on that, the answers would be:
1. 150. Do 20*5 first, as it's in parentheses, then multiply by 10.
2. 36. Same thing as #1 but different numbers.
3. 51. Do the stuff in parentheses first, then multiply because it gets priority over subtraction and then subtract.
4. 16. Do the multiplication in the parentheses first, then the subtraction, and then the division.
Answer:
Unit Price= $1.18
The error is that the contractor divided $99.12 by 7 and didn't multiply the 7 by the dozen (12) first, which lead to a mistake.
Step-by-step explanation:
To find the unit price:
1) multiply 7x12 = 84
to get the total amount of gloves
2) divide 99.12 by 84
to get the unit price
Deposit mean add 50, then withdraw means taking out 20, you do subtraction: $50-$20=$30
2k+3k+2-2=13-2-3k+3k
5k=11
5k/5=11/5
K=11/5
