Martin recorded the low temperatures at his house for one week. The temperatures are shown below. -7, 3, 4, 1, 2, 8, 7
Approximately what was the average low temperature for the week?

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What is the answer to this question? i'm a bit stumped. also how do i do it? 5(x - 4) = 2(x + 5)

Dean and karlene get paid to write songs. dean is paid a one-time fee of $20 plus $80 per day. karlene is paid a one-time fee of $25 plus $100 per day. write an expression to represent how much a producer will pay to hire both to work the same number of days on a song.