PLEASE HELP ME I WILL GIVE BRAINLIEST From the two berths of the river, two motorboats sailed towards each other at the same speed. After 3 hours they met. The boat, which was running downstream, traveled 18km more than the other boat. Calculate the rivers current speed!

Also help me, how can i calculate text problems like these in general? (linear equations)​

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

Fixed rate mortgage offer: purchase price: $170,000 down payment ($34k): 20% term: 30 years interest rate: 4.25% property tax (yearly): $1,500 homeowner’s insurance (yearly): $1,000 use this example from a fixed-rate mortgage calculator to you answer the questions. keep the page open after you complete this question. according to the calculator, the monthly payment demarco and tanya should anticipate paying for principal and interest is $208. $877. $669. $1,200.

|y + 2| > 6 {y|y < -8 or y > 4} {y|y < -6 or y > 6} {y|y < -4 or y > 4}