1. 34.61; tax 72. 34.61; sale 15% off3. 34.61; markup 35%4. 34.61; tip 20%i know it's a lot, but i'd be very appreciative to the person who solves this

37.03, 29.42, 46.72, 41.53

Step-by-step explanation:

I'm assuming 1 means tax 7% and 7% in decimals is 7/100 = 0.07.  Now the original amount is 34.61 meaning that that is 100%, and 100% in decimals is 100/100 = 1.  So easy way of doing these is:

1.) 34.61 + 7% tax = 34.61(1+.07)=34.61(1.07) = 37.03

2.) 34.61 - 15% = 34.61(1-0.15) = 34.61(0.85) = 29.42

3.) 34.61 + 35% = 34.61(1+0.35) = 34.61(1.35) = 46.72

4.) 34.61 + 20% = 34.61(1+0.20) = 34.61(1.20) = 41.53

Note that I did round to the nearest cent since we don't have a coin less than a penny.

step-by-step explanation:

1. practice, practice & more practice

2. review errors

3. master the key concepts

do not try to memorise the processes.

4. understand your doubts.

5. create a distraction free study environment

6. create a mathematical dictionary

7. apply maths to real world problems.

answer is  

c.

36

step-by-step explanation: