We are asked to evaluate the expression. Remember to solve according to PEMDAS: Parentheses, Exponents, Multiplication, Division, Addition and Subtraction.
Solve inside the parentheses. Add 3 and 7.
⇒3+7=10
Multiply 4 and 10.
⇒4*10=40
Add 6 and 40.
⇒6+40=46
When the expression 6+4*(3+7) is evaluated, the result is 46.
Https://www.khanacademy.org/math/cc-sixth-grade-math/cc-6th-data-statistics/cc-6th/v/calculating-interquartile-range-iqr
This is a link that I gave to my little sister that helped her understand what interquartile range is. It has an example as well! I hope this helps!