I just don't know how to do it

Answer this question! 30 points and brainliest!

Given: m∠ adb = m∠cdb ad ≅ dc prove: m∠ bac = m∠bca lol

Suppose that a households monthly water bill (in dollars) is a linear function of the amount of water the household uses (in hundreds of cubic feet, hcf). when graphed, the function gives a line with slope of 1.65. if the monthly cost for 13 hcf is $46.10 what is the monthly cost for 19 hcf?