exam Maths Puzzle Numerical Ability

Find the slope and the y-intercept of the line whose equation is -3x + y = -5.

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exam Other Question

9. Using Factoring, how do I complete this exercise?

25x^2 + 20x + 4

thank you!
Can you please help me solve using the substitution method?

x + y = 1
x + y = 2