Chapter 3

Determine whether a scatter plot of the data for the following might show a positive, negative, or no relationship. age and number of siblings

Jake ran \(x\) miles on Monday, \(y\) miles on Tuesday, and \(z\) miles on Wednesday. Write an expression for the average number of miles Jake ran.

What is the value of \(\frac{3(4 a-3 b)}{b-4}\) if \(a=6\) and \(b=7 ?\)

Determine whether a scatter plot of the data for the following might show a positive, negative, or no relationship. temperature and sales of sunscreen

Write each subtraction expression as an addition expression. $$5-3$$

A wallpaper roll contains a sheet that is 40 feet long and 18 inches wide. What is the minimum number of rolls of wallpaper needed to cover 500 square feet of wall space?

Write an algebraic expression for each verbal expression. two times a number less six

Write each subtraction expression as an addition expression. $$-8-4$$

Find sum. \(-5+4\)

Write an algebraic expression for each verbal expression. the quotient of a number and 15

Write each subtraction expression as an addition expression. $$10-14$$

Find sum. \(-8+(-3)\)

Write an algebraic expression for each verbal expression. the difference between twice a number and 8

Write each subtraction expression as an addition expression. $$8-(-6)$$

Find sum. \(10+(-1)\)

Write an algebraic expression for each verbal expression. three times a number increased by 10

Write an algebraic expression for each verbal expression. the sum of \(2 x, 7 x,\) and 4