Which expression is equivalent to 8+ 18 a -2+6a? plz need

The only way to identify an intercept is as an ordered pair. true false

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics