Examination practice Exam-style questions
1 The quadratic equation x2 - 5x – 3 = 0 has solutions a and b. Find the value of:
i
ii a + b
Leave your answers in exact form.

At the beginning of year 1, carlos invests $600 at an annual compound interest rate of 4%. he makes no deposits to or withdrawals from the account. which explicit formula can be used to find the account's balance at the beginning of year 5? what is, the balance?

On questions #8 and #9 don't mind my answers they're probably wrong.

Samantha had 75 necklaces to cell by the end of the first week there was only 57 necklacesleft by the end of the second week there were only 38 necklaces left find the percent decrease in the number of necklaces by the end of the first week