If y varies jointly with x and z, and y = 200 when x = 8 and z = 10, what is x when y = 165 and z = 11?

What is the value of k?

Scores on the GRE (Graduate Record Examination) are normally distributed with a mean of 600 and a standard deviation of 120. Use the 68 dash 95 dash 99.7 Rule to find the percentage of people taking the test who score between 240 and 960.

A chess player won 72 of the games he played. If his ratio of wins to loses was 9:4, how many games did he play total?

Im really confused on this one

Zhang Li solves the equation below by first squaring both sides of the equation. - 4=/sqrt{5z+7}-4 = 5z+7 minus, 4, equals, square root of, 5, z, plus, 7, end square root What extraneous solution does Zhang Li obtain?

You are driving to a vacation spot that is 1500 miles away. Including rest spots, it takes you 42 hours to get to the the vacation spot

Lisa sold $75 worth of play tickets. Adult tickets cost $4 each and children tickets cost $3 each. How many children's tickets could she have sold? is there more than one answer

Your brothers hourly wage is 4/5 of your sisters hourly wage. if your brother earns $10 per hour, what does your sister earn?

Jamal decides he wants to shop around for the best price for purchasing an advertisement space in a newspaper. One of the companies he contacts charges $2.00 for each line in the advertisement and an initial fee.

How does adding with decimals compare to adding whole numbers?

Scorpion was walking down the street he had 2 swords on his back but while he was walking Sub-Zero jumped on the back and took Scorpions sword while Sub-Zero already had 1 sword now how many swords does Sub-Zero have?