Hey, just trying finish up some math before school ends. What's the answer to 3n+2(-2n-1) ? Thanks!

Me because some of question i don’t understand

Find the area of a parallelogram with base 15 yards and height 21 2/3

If the car had not hit the fence, how much farther would it have skidded? solve the skid-distance formula to find the extra distance that the car would have traveled if it had not hit the fence. round your answer to two decimal places. note that unit conversion is built into the skid distance formula, so no unit conversions are needed.