### Kevin's Scribe Post

Thursday, January 29, 2009

Today in math class, we were given sheets of papers that had 10 algebra questions on them. We had to only do 8 of those. For today's scribe, I'll help you with 4 questions of the 8, so you will only have to do four.

1. A certain number plus 26 equals 51. What is the number?

The number is __

Let N = number

N+26=51

N+26-26=51-26

N=25

Verify:

N+26=51

25+26=51

51=51

The number is 25

2. Three more than twice a number is nineteen. Find the number.

The number is ___

Let N = number

2N+3=19

2N+3-3=19-3

2N/2=16/2

N=8

Verify:

2N+3=19

2(8)+3=19

16+3=19

19=19

The number is 8.

3. Six times a certain number minus eight is forty. What is the number?

The number is __

Let N = number

6N-8=40

6N-8+8=40+8

6N/6=48/6

N=8

Verify:

6N-8=40

6(8)-8=40

48-8=40

40=40

The number is 8.

4. Terry has a certain amount of money and Rick has three times as much. If together they have $2.60, how much did each boy have?

They each had ___ dollars/cents.

Let N = Dollars/Cents

This one is different, so we must first identify what we know about each person.

Rick: 3N(We know that he has 3 times as much as Terry)

Terry: N (We don't know how much Terry has or anything about it)

3N+N=2.60

4N=2.60

4N/4=2.60/4

N=0.65

Verify:

4N=2.60

4(0.65)=2.60

2.60=2.60

They each had $0.65 cents.

That is all for today, I don't think we had any other homework.

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Liem 8-17said...Good work kevin, nice date... Now I'm going to sleep, and be ready for my test.

January 29, 2009 at 10:36 PM

Karen8-17said...Good Job Devin!

I like your date haha, really creative. You explained everything but I still don't get #4.

January 31, 2009 at 8:47 PM

Kevin 8-17said...Ok, let me fix it and see if you understand it after.

February 1, 2009 at 1:22 PM