**Chapter 2.2**

**Problem Solving With Rational Numbers in Decimal Form**

Question #28

Evaluate Each Expression.

A) 3.6 + 2y

y=(-0.5)

B) (m-1.7)(m+1.8)

m= 1.7

C)4.5/q - 4.5/q

q=(-3.6)

For A)Since it has already given me the variable y's number, I will just plug in the numbers to see if the equation is correct.

3.6 + 2y

Just add in what y is which in this case is (-0.5).

3.6 + 2(-0.5)

3.6 + (-1)

2.6

The reason why I did multiplication first was because of B.E.D.M.A.S.

For those who do not know what B.E.D.M.A.S is, it means

B = Brackets ()

E = Exponents

D = Division 6/3 is 2

M = Multiplication 2X3 is 6

A = Addition

S = Subtraction

For C) I did the same thing as I did with the first question.

(m - 1.8)(m + 1.8)

Again add what the variable is which is 1.7.

(1.7-1.8)(1.7+1.8)

(-0.1)(3.5)

The brackets that are closed together is just basically multiplication.

(-0.35)

And for C) It's just the same as A and B.

4.5/q - q/4.5

4.5/-3.6 - (-3.6)/4.5

-1.25 - (-0.8)

(-0.45)

Of course ask questions!

I'll answer when ever I can.

Good job Kevin! Before I say the nice things about the post (quite a few), you had a slight typo on the second question. You called it c) when it should of been b). I liked how you explained each question and showed how to do. I really like the reminder about BEDMAS. You could of put in some colour or bolded words though. Overall a great post!

ReplyDelete-Nils