Please solve with explanation I’ve been asking all day (this is not a multiple choice question)

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

Given: hf || jk; hg ? jg prove: fhg ? kjg to prove that the triangles are congruent by asa, which statement and reason could be used as part of the proof? fgh ? kgj because vertical angles are congruent. jkg ? hfg because vertical angles are congruent. fhg ? jkg because right angles are congruent. hfg ? kjg because alternate interior angles are congruent.

Keith runs 5 miles in 38 minutes. at the same rate, how many miles would he run in 57 minutes