exam Maths Puzzle Numerical Ability

Peter wants his math average to be above 85 for the year. If his average is for the first three quarters are 80,78, and 92, what must he score for the fourth quarter to achieve his goal?

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exam Other Question
1. 5(x - 2)^2=3

2. Find the x-intercepts. y = x^2 + 3x - 8

3. Find the axis of symmetry. "y = x^2 - 5 + 10"
4. Solve. (x - 3)^2 = 6 can you please help me graph the feasible region.

2x + 3y <_ 12
2x + 3y > -6
3x + y < -6
x >_ 0
y >_ 0