X+y=100 4.50+20y=822.00 solve for x and y

The marked price of an article is 25% above its selling price and the cost price is 30% less than its marked price . find the discount percent and gain percent. only a brainlest can solve it i will mark you brainlest

Which pair of numbers is relatively prime? a. 105 and 128 b. 130 and 273 c. 205 and 350 d. 273 and 333

In a timed typing test lara typed 63 words per minute.estimate the number of words she should be able to type in half in hour show your work