In the triangle xyz, zv is both the median and the altitude, if xy=9x+12 and xz=11x+2 and yz=4x+20 find the perimeter

Write the fraction or mixed number and the decimal shown by the model

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. what distance from city a is the point where the truck and the car will meet?

The holiday party will cost $160 if 8 people attend.if there are 40 people who attend the party, how much will the holiday party cost