3rd grade work

mr. dunn estimates he uses 3 gallons of gas over the course of a week. how many miles per gallon does his car get?

Estimate the product. round the first factor to the nearest whole number, round the second factor to the nearest ten, and then multiply. 3 8/9 × 96

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"