How would I write this polynomial in standard form and then identify the leading coefficient –2 + x – 4+ 3?

Find the distance between the point (-3,-4), and (see the picture below)

What number gives you a irrational number when added to 2/5

Masons cell phone company charges $0.12 for every text message he sends plus $2.50 per month if mason sent 25 messages this month how much money does he owe the one with the correct answer and explanation gets 10 points and is marked as the brainliest answer