exam Maths Puzzle Numerical Ability

write an equation in slope-intercept form for the line that satisfies each set of conditions.

PASSES THROUGH (4,7), perpendicular to the line that passes through (3,6) and (3,15

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exam Other Question
16 radical x + 2 radical x Could you please help me solve this system of equations by using A^-1?

x+5y+5z=-7
x+4y+5z=-5
x+5y+4z=-5