Consumer Loan – personal credit debt auto

Nickname? asked:


Please give me a formula in which i could solve theses problems by (you don’t need to solve all the problems to get the best answer but it is prefered:
1.Workers at a particular company have won a 7.6% pay increase. Moreover, the increase is retroactive for six months. Have x as the employee’s previous pay. Solve the amount of retroactive pay due the employee, the new annual salary, and the new monthly salary.

2.The public utilities commission has decided that the electric company overcharged its customers for two months’ last year. To make up the difference to the customers, the commission therefore orders the company to decrease next month’s bills by 10%. The city also levies a 3% utility tax, which is to be applied to the bill before it is discounted. Also, the 10% discount does not apply to the utility tax. Assume electricity costs $0.16 per kilowatt-hour. What will be next month’s electricity bill, if x is the kilowatt-hour of energy consumed

3.Negotiating a consumer loan is not always straightforward. One form of loan is the discount installment loan, which works as follows. Suppose a loan has a face value of $1000, the interest rate is 15%, and the duration is 18 months. The interest is computed by multiplying the face value of $1000 by 0.15 to yield $150. That figure is then multiplied by the loan period of 1.5 years to yield $225 as the total interest owed. That amount is immediately deducted from the face value, leaving the consumer with only $775. Repayment is made in equal monthly installments based on the face value. Thus, the monthly loan payment will be $1000 divided by 18, or $55.56. This method of calculation may not be too bad if the consumer needs $775, but the calculation is a bit more complicated if the consumer needs $1000. If x is the amount the consumer needs to receive, and y is the interest rate and z in the duration of the loan in months, then what is the formula to calculate the face value required in order for the consumer to recieve amount needed? What is the formula for the monthly payment?
If possible please leave an explaination
I need this BADLY!

Matthew