exam Maths Puzzle Numerical Ability

please help me with these: what intercept procedure do i use for 1/2y=4+x;
determine te slope and y-intercept by inspection y= -7/8x-3
Graph the euations using the slope-inter

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exam Other Question

How many positive real solutions are there in:

f(x) = -2x^4 + 3x^3 + 7x^2 + 2

a. 0
b. 2
c. 1
d. None, there is no x-term
what is the square root of 60?