What is the reason for the fourth statement in this proof?

0.3z - 0.02z + 0.2 = 1.8

Britney read a total of 10 books over 2 months. After belonging to the book club for 3 months, how many books will Britney have read in all? Assume the relationship is directly proportional.

Greatest to least 4; 4.022; 4.002; 4.221

What statement is an example of addition property of equality

Suppose you got 8 mangoes and 3 apples for $18 and 3 mangoes and 5 apples for $14.50. How much does each mango and each apple cost?

What is the remainder when (3x3-2x+4x-3) is divided by (x2+3x+3)

What is the value of y when y=10 and 1/4x+10-2y=3y

12.14 - How Many Cups of Coffee? Choose an adult age 18 or over in the United States at random and ask, "How many cups of coffee do you drink on average per day?" Call the response X for short.

What is 9.3488 rounded to the nearest tenth?

What is the interquartile range for Tom's data? Explain how you found the interquartile range.