Is this in proper standard notation? 5x - 5y = 7 i will give brainliest to the correct answer (which will be later today or tomorrow)

Iq scores for adults age 20 to 34 years are normally distributed according to n(120, 20). in what range does the middle 68% of people in this group score on the test?

The ivring berlin learning center would like a possible net profit of $650,000 on its new resource manual it sells to schools. the fixed costs for producing the manual are $780,000 and the variable cost per package is $19.85. if the estimated unit sales are 1,250,000 units, what selling price unit should the ivring berlin learning center try?

Sam is picking fruit from a basket that contains many different kinds of fruit. which set of events is independent?