Can someone help me with these questions my head hurts

Write the slope-intercept form of the line that passes through the point (1, 0) and is parallel to x - y = 7. t

The marked price of an article is 25% above its selling price and the cost price is 30% less than its marked price . find the discount percent and gain percent. only a brainlest can solve it i will mark you brainlest

26) -2(7x) = (-2 • 7) x a. associative property of addition b. associative property of multiplication c. commutative property of multiplication d. commutative property of addition