exam Maths Puzzle Numerical Ability

Find the y-intercept. -2x + 2y = 16

Find the slope and y-intercept. x = -9

Can someone please help me with these?

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exam Other Question

Write a flowchart proof for the conjecture: The diagonals of a rectangle are congruent.
Given: Rectangle ABCD with diagonals AC and BD
Show: AC is congruent to BD

i tried i j 1).The area of the floor of the rectangle room shown is 175 square feet. The lenght of the room is 1 1/2 longer than the width. Find the lenght of the room?
Area = 175 square feet