exam Maths Puzzle Numerical Ability

Graph the solution set:
4x+y>-8
x-y<-3
x>-0, y>-0

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exam Other Question

what is the minimum score needed to make on the 5th test so that the mean test score is at least 85? The first 4 test were 87, 92, 76, and 89 please help me solve this promblem
use the substitution method to solve the linear system
here is the promblem
x-5y=-10
y=-2x-9
please help