Liz makes a large amount of purple paint by mixing red and blue paint in the ratio 3: 7. red paint cost £20 for a 3litre tin. blue paint costs £30 per 3litres.

On saturday morning, calls arrive at ticketmaster at a rate of 108 calls per hour. what is the probability of fewer than three calls in a randomly chosen minute?

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?

What is a correct first step in solving the inequality-4(3-5x)> -6x+9