Help me with this pleaseee

How many natural numbers n satisfy the inequality: 1/7 < n/10 < 4/5 ?

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

What is the solution for the following system of equations? use any method to solve. 2x + 8y = 4 x = -3y + 5 question 4 options: x = 14, y= -3 x = 2, y = -3 x = -3, y = -3 x = 12, y = 5