What fraction of a pound is 40p

Y -2x=4 solve the equation for the variable y. What is y?

Samuel earns $50.75 each week by working at a part-time job. He works the same amount of time each day for 5 weeks. What is the total amount of money Samuel earns during the 5-week period?

Solve if you are a genius.No trick. Pure math. Gud luck Solve it

You are standing in one big palace where a king and his 5 queens stay.
Each queen has 5 rooms. In each room there are 5 big cats.
Each big cat has 5 little cats. Each cat has 4 legs.How many legs are there in the palace?

Take ur time...Solve if you are a genius.

No trick. Pure math. Gud luck Solve it

You are standing in one big palace where a king and his 5 queens stay.
Each queen has 5 rooms. In each room there are 5 big cats.
Each big cat has 5 little cats. Each cat has 4 legs.How many legs are there in the palace?

Take ur time...

1)In a sample of 100 households, the mean number of hours spent on social networking sites during the month of January was 50 hours. In a much larger study, the standard deviation was determined to be 6 hours.
Assume the population standard deviation is the same. What is the 98% confidence interval for the mean hours devoted to social networking in January?

2)Two studies were completed in Florida. One study in northern Florida involved 2,000 patients; 64% of them experienced flu-like symptoms during the month of December.
The other study, in southern Florida, involved 3,000 patients;
54% of them experienced flu-like symptoms during the same month. Which study has the smallest margin of error for a 95% confidence interval?

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What do these all mean???

Which is the value of this expression when a=5 and k=-2