Which of the following expressions is equal to - 1?

sec90°

sin180°

csc270°

Work out the circumference of the circle of 6mm

L'Shanda can choose between 3 sweater and 4 skirts. if selects 1 sweater and 1 skirt, how many possible outcomes are in the sample space?

What number is a reasonable estimate for 39x24

420 is 3/5 of what number

What is the product of - 3 and 9?

What does the equation y = x2 represent as a curve in the set of real numbers2?

The printer charges $4 per book to print it, and you spent $3500 on advertising. you sell the book for $15 a copy. How many copies must you sell so that your income from sales is greater than your total cost?

A roller coaster can accommodate 346 rider in 20 minutes. How many riders could ride in 90 minutes?

You have $12 to buy five goldfish for your new fish tank. Write and solve an inequality that represents the prices you can pay per fish.

Adam has 16.45 kg of flour, and he uses 6.4 kg to make hot cross buns. The remaining flour is exactly enough to make 15 batches of scones. How much flour, on kg, will be in each batch of scomes?