3rd Year Hwk Due Tue 10th Feb 15

To be done in front of books neatly. Show all working out. Marks: 21

ANSWERS

1. Solve \[ \begin{align*} 3&x+4y=19 \\ -5&x+6y=59 \end{align*} \]

   [3 marks]

2. A jacket is reduced by £45 in a 15% OFF sale. What was the price of the jacket in the sale?

   [3 marks]

3. A ball bounces to 90% of the previous height. If it was dropped from 5m, how high will it reach after the third bounce?

   [3 marks]

4. Give a quick explanation of why the sine ratio is never more than 1.

   [2 marks]

5. In a test there are 50 questions. For each correct answer I score 7 points and for each incorrect answer I lose 3 points. If my total score for the test was 260 points, set up simultaneous equations to find x (the number of questions I got correct) and y (the number of questions I got wrong).

   [4 marks]

6. Find x to 2decimal places
   

   [3 marks]

7. Find the angle x to 1 decimal place.
   

   [3 marks]