There are 57 M&Ms in a standard size bag. At 240 calories per bag, how many calories is it per M&M? Round to the nearest tenth

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

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

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.