Arlene is showing her work in simplifying −7.9 + 8.2 − 3.4 + 2.1. identify any errors in her work or in her reasoning. write feedback to arlene explaining the mistake she made and how to correct her work. step work reasoning −7.9 + 8.2 − 3.4 + 2.1 original problem 1 −7.9 + 8.2 + (−3.4) + 2.1 additive inverse 2 −7.9 + (−3.4) + 8.2 + 2.1 associative property 3 (−7.9 + (−3.4)) + (8.2 + 2.1 commutative property 4 −11.3 + 10.3 simplify 5 −1 simplify

There is nothing wrong with Arlene's math. Her answer is correct. The mistake is that she has cited the "associative property" where the "commutative property" should have been cited, and vice versa.

The associative property has to do with where you put parentheses. The commutative property has to do with what order the operands are in.

In step 2 and step 3 reasoning mistakes

Step-by-step explanation:

We are given that Arlene is showing her work in simplifying -7.9+8.2-3.4+2.1

We have to find error and correct the error made by Arlene in her work

Original problem : -7.9+8.2-3.4+2.1

Step 1: -7.9+8.2+(-3.4)+2.1

Additive inverse property

Step 2:-7.9+(-3.4)+8.2+2.1

Using Commutative property   (commutative property a+b=b+a)

Step 3:(-7.9+(-3.4))+(8.2+2.1)

Using associative  property   (Associative property a+(b+c)=(a+b)+c))

Step 4: -11.3+10.3

By Simplification

Step 5:-1

By simplification

Arlene simplify in correct way but she is doing mistake in reasoning in step 2 and step 3.

d

because parallelagram have all 4 angels the same size dependeing and a rectangle and square are oth parallelogram

the above table 1 will calculate the population size (n) after a certain length of time (t). all you need to do is plug in the initial population number (no), the growth rate (r) and the length of time (t). the constant (e) is already entered into the equation. it stands for the base of the natural logarithms (approximately 2.71828). growth rate (r) and time (t) must be expressed in the same unit of time, such as years, days, hours or minutes. for humans, population growth rate is based on one year. if a population of people grew from 1000 to 1040 in one year, then the percent increase or annual growth rate is 40/1000 x 100 = 4 percent.

step-by-step explanation: