For each question, choose the most suitable answer.
1. Mr. Raja buys a basket of durians for RM 150. He sells <i>x</i> kg of big durians at RM 10 a kg and <i>y</i> kg of small durians at RM 8 a kg. he makes a profit at RM 70. The linear equation in <i>x</i> and <i>y</i> is
A) `@x + y@` =220
B) `@10x + 8y@` =150
C) `@10x + 8y@` = 220
D) `@10x + 8y@` =80
2. A pair of schol uniform costs RM 25 and a school beg costs RM 35. Puan Halimah buys <i>t</i> pairs of school uniform and <i>v</i> school begs. She has to pay a total of
A) `@25t + 35v@`
B) `@70tv@`
C) `@25v + 35t@`
D) `@5t + 7v@`
3. Given that `@ 2x + y@` = 8 and when <i>x</i> = -2, then <i>y</i> =
A) 12
B) 10
C) 8
D) 4
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