First, simplify the denominator into 1+3i. Then multiply both the numerator and denominator by 1-3i to rationalize the denominator. Then, the numerator becomes i+3, and the denominator becomes 10. So, the first answer is correct.
None .. theres no solution
Answer:
1. n = 13
2. x = -30
3. y > -18
4. n < -0.75
5. 101 t-shirts
Step-by-step explanation:
1. multiply both sides by 2, then add both sides by 2, making n = 13
2. divide both sides by -3, then subtract both sides by 5 making x = -30
3. divide both sides by -2, when dividing by a negative number, you need to switch the inequality sign to the other side
4. divide both sides by 4, then divide by -2(you need to switch the inequality sign to the other side), then add -8 and 2.5, then add 5.5 to both sides
5. the equation is 150 = 5x - 45. 45 is because they have already earned it, and 5x is how much each shirt will cost. The solution is then 101.
Hope this has a helped a little at least :P
