Solve by elimination

3x + 5y = - 1

7x - 5y = 31

If the exterior angle of a regular polygon is 72°, how many sides does it have? What is another name for this shape?

Las propiedades con los números reales

Factor - x + 25x - 100

If you have $13 and spend $4 on a sandwich, drink and chips, what fraction of your money did you spend?

What are two decimals equivalent to 5.000

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?

Rebecca has 30 paintings to sell. the amount of money rebecca makes from selling x paintings is represented by a function.