X:1≤x≤9,x is a prime​

1.two more than the quotient of a number and 6 is equal to 7 use the c for the unknown number translate the sentence into an equation

Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens as inna. how many pens did inna give liz?

What is the 9th term in the geometric sequence described by this explicit formula? an=-6. (2)(n-1) apex