I don't know these some one help?

25 ! i need asap! ! ill mark brainliest!

Y= 4x + 3 y = - 1 4 x - 5 what is the best description for the lines represented by the equations?

How many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.) how many 3-digit numbers can you write using only digits 1 and 7? (of course, digits can repeat.)