Grade 8 Practice Math Challenge Question and Answer Part II

Direction: Write equation of the line in ax+by+c=0                           Time: 1 hour

1. What is the set of values that will make the sentence like 2x+5>7 called?
2. What is the range of y=2x²-1 on {1<x<4}
3. What is the range of y=2x²-1?
4. In which quadrant(s) is the graph of 2x-y=0
5. Write in symbols: “the product of four and x divided by 3 is at most 10”.
6. What is the zero of 3x-2y=12?
7. What is the greatest integer function of f(3.6)?
8. What is the slope of the line through (2,-3) and (1,-2)
9. Find the equation of the line with an x-intercept of 2 and passing through (0,-1)
10. If f(x) = x²+6x+9. What is f(3)?
11. What is the y-intercept of 3x-4y-12=0?
12. Find the point of intersection of the lines 2x-y+1=0 and 3x-4y+6=0.
13. For what value of k will 2x-y-4=0 and 10x-5y+k=0 be dependent?
14. For what value of K will make 3x+4y+5=0 and 2x-ky-1=0 parallel?
15. Solve for x and y: 1/x+1/y=1 and 1/x-1/y=3.
16. Solve for x: 3x-4>17
17. Write 364,000,000,000 in scientific notation.
18. What value(s) of x is not permissible in ?
19. Write in standard form: 0.12 x 10⁵.
20. Simplify:     
21. Solve for x: 
22. Factor completely: 3xy-6x+3y-6
23. What is the domain of ?
24. What is the range of equation in #23?
25. 25. If a_n=2^2n-1 – 1 , What is a₄?

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