40) Consider the steps to simplify the expression. What property of operation is used in Step 2? Expression: -4% +7-34 Step 1: = -47+7+43 (-34) Step 2:= -45 Step 3: = 4+ (3)+(-3)+(-7)+7 Step 4:= -4 +63)+(-7)+(-3) +7 +7 Step 5:= -4 + (-1) + (-3) + 7 Step 6: = -8 +7 Step 7: = -1 A) Apply the associate property of addition, B) Apply the commutative property of addition. C)The opposite of a sum is the sum of it's opposites. D) Subtracting a number is the same as adding the inverse.​

You are looking at two area rugs for your bedroom. one is a square with side lengths of 6.3 feet. the other is a rectangle that is 4.8 feet by 8.2 feet. which rug will cover the greatest area? how much more area will it cover? with work plzz and u so much

Arandomized controlled trial is designed to evaluate the effect of metoprolol in patients with heart failure. while preparing for statistical analysis, the researcher reviews some common types of statistical errors. which of the following statements is true regarding a type i error in a clinical study? a. the study is not significantly powered to detect a true difference between study groups. bthe null hypothesis is true but is rejected in error. c. the null hypothesis is false but is accepted in error. d. type i error is also known as beta and is usually 0.1 or 0.2. e. type i error depends on the study's confidence interval.

Landon drove 103.5 miles on tuesday 320.75 miles on wednesday and 186.30 miles on thursday for work his company pays 0.07 $ for each mile he drives he expects to be paid more than $40,000 is he correct explain