Please help! I need this now who ever gets this first will get a brainlest

Answer this question! 30 points and brainliest! only if you know the answer.

Lines d, e, and f are parallel. that means they have the same slope. each of these lines has a slope of -3. enter numbers to complete an equation fir each line

Robert is replacing sod in two square shaped areas of his backyard.one side of the first area is 7.5 feet.one side of the other is 5.7 feet.the sod costs y dollars per square foot.