1. Solve
.
A. x = 2, y = 3 B. x = 3, y = 2 C. x = 3, y = 4
D. x = 4, y = 3 E. x = 4, y = 4
2. Solve
.
A. x = 20, y = 25 B. x = 25, y = 20 C. x = 15, y = 30
D. x = 30, y = 15 E. x = 30, y = 30
3. Solve
.
4. If
,
find the value of y.
5. Find the value of xy if
.
6. If the simultaneous equations
have only one solution, find the value of k.
7. If the simultaneous equations
have two distinct solutions, find the range of the values of k.
8. Which of the following straight lines does not intersect with the curve ?
A. y = x - 7 B. y = x - 8 C. y = x - 9 D. y = x - 10 E. y = x - 11
9. The product of x and y is 128. If y is decreased by 8, then their product will be halved.
Find the value of y.
10. In a group of birds and rabbits, there are 30 heads and 84 legs. Find the number of rabbits.