18. The smaller of two consecutive integers is four more than half the greater.

Landshark44 · 11-12-2009, 06:06 PM

Can I get a little help with my boys 7th grade math?

19. A rectangle has an area of 110cm(squared). The lengths in centimeters of two adjacent sides are consecutive integers....

20. I am thinking of four consecutive integers. the sum of the second and fourth equals the thisr increased by 17.

thanks, i don't have a clue.....

JeeberD · 11-12-2009, 06:09 PM

18. 9 and 10

RPI-Fan · 11-12-2009, 06:09 PM

Quote:

Originally Posted by Landshark44

Can I get a little help with my boys 7th grade math?

19. A rectangle has an area of 110cm(squared). The lengths in centimeters of two adjacent sides are consecutive integers....

20. I am thinking of four consecutive integers. the sum of the second and fourth equals the thisr increased by 17.

thanks, i don't have a clue.....

19) x * (x + 1) = 110
x^2 + x - 110 = 0
quadratic formula yields x = 10 OR x = -11
throw out the negative answer, so x = 10
L1 = X = 10
L2 = X + 1 = 11

RPI-Fan · 11-12-2009, 06:11 PM

Quote:

Originally Posted by Landshark44

Can I get a little help with my boys 7th grade math?

19. A rectangle has an area of 110cm(squared). The lengths in centimeters of two adjacent sides are consecutive integers....

20. I am thinking of four consecutive integers. the sum of the second and fourth equals the thisr increased by 17.

thanks, i don't have a clue.....

20) x, x + 1, x + 2, x + 3
x + 1 + x + 3 = x + 2 + 17
2x + 4 = x + 19
x = 15

15, 16, 17, 18

BishopMVP · 11-12-2009, 06:11 PM

Quote:

Originally Posted by RPI-Fan

19) x * (x + 1) = 110
x^2 + x - 110 = 0
quadratic formula yields x = 10 OR x = -11
throw out the negative answer, so x = 10
L1 = X = 10
L2 = X + 1 = 11

You could also just square root the 110 and use the 2 bracketing numbers. (EDIT - but teachers always did hate me and only give me half-credit because I didn't show work or use formulas, so RPI's is probably better for your purposes.)

20. 15, 16, 17, 18

Landshark44 · 11-12-2009, 06:12 PM

jeeberD, my boy has to show the work. do you have an equation that supports the answer? thanks

RPI-Fan · 11-12-2009, 06:13 PM

18) x - 1, x

x - 1 - 4 = x/2
x - 5 = x/2
x/2 = 5
x = 10

x - 1 = 9, x = 10

Radii · 11-12-2009, 06:14 PM

Quote:

Originally Posted by Landshark44

jeeberD, my boy has to show the work. do you have an equation that supports the answer? thanks

x = smaller integer

x = (X+1)/2 + 4

x-4 = (X+1)/2

2(x-4) = (x+1)

2x - 8 = x + 1

x = 9

EagleFan · 11-12-2009, 06:23 PM

Quote:

Originally Posted by Landshark44

19. A rectangle has an area of 110cm(squared). The lengths in centimeters of two adjacent sides are consecutive integers....

Centimeters? Are they buying discount Canadian math textbooks in AC?

Is each question followed by "What's the answer eh?"

EagleFan · 11-12-2009, 06:25 PM

dola: How long have you been in AC?

EagleFan · 11-12-2009, 06:26 PM

double dola (and a thread jack): Any flooding problems in AC today? This rain seems like it's never going to end these past couple days.

Landshark44 · 11-12-2009, 06:27 PM

thanks for the help, guys. i still have a question about #19, because my boy has not learned the quadratic formula. is there another way?

thanks

Landshark44 · 11-12-2009, 06:28 PM

i'm actually in brigantine, and yes, it's underwater......

Groundhog · 11-12-2009, 06:38 PM

nerds

RPI-Fan · 11-12-2009, 06:40 PM

Quote:

Originally Posted by Landshark44

thanks for the help, guys. i still have a question about #19, because my boy has not learned the quadratic formula. is there another way?

thanks

BishopMVP's way...

Suppose the rectangle is actually a square what would it's sides be? Sqrt(110)

Since it's a rectangle, and we know it's sides are consecutive integers, just take the integers above and below sqrt(110).

JediKooter · 11-12-2009, 07:57 PM

Well, there's the problem...they are using the metric system.

Passacaglia · 11-12-2009, 08:37 PM

For #20, there's no reason for the problem to mention four consecutive integers -- since the first one isn't used in the problem, only three are needed.

fantom1979 · 11-13-2009, 09:47 AM

Nevermind, forgot the problem was area.

-apoc- · 11-13-2009, 11:01 AM

You can use the FOIL method instead of the quadratic equation
x^2 + x - 110 = 0
(x-10)(x+11)=0
X=10, X=-11
X=10 since it cant be a negative number

Drake · 11-13-2009, 12:34 PM

I would just like to add that as an English major, this thread has made me really hot for RPI-Fan, Radii and BishopMVP.

And -apoc-. Mustn't forget -apoc-.

Lathum · 11-13-2009, 12:44 PM

Quote:

Originally Posted by Drake

I would just like to add that as an English major, this thread has made me really hot for RPI-Fan, Radii and BishopMVP.

And -apoc-. Mustn't forget -apoc-.

As a history major I agree.

Especially Radii, I'm a sucker for a guy who lives with his parents

Landshark44 · 11-13-2009, 01:06 PM

i'm embarrassed that i can, barely, follow along.....

and it's only 7th grade math

but thanks for the help, i'm sure i'll have some more questions we can't figure out....

Schmidty · 11-13-2009, 01:11 PM

Quote:

Originally Posted by Drake

I would just like to add that as an English major, this thread has made me really hot for RPI-Fan, Radii and BishopMVP.

And -apoc-. Mustn't forget -apoc-.

+1

Apathetic Lurker · 11-13-2009, 04:09 PM

STOP.THE.MATH !!!!! my brain hurts

11-12-2009, 06:13 PM	#7
RPI-Fan Pro Starter Join Date: Nov 2000 Location: Troy, NY	18) x - 1, x x - 1 - 4 = x/2 x - 5 = x/2 x/2 = 5 x = 10 x - 1 = 9, x = 10 __________________ Quis custodiets ipsos custodes?

11-12-2009, 06:38 PM	#14
Groundhog Coordinator Join Date: Dec 2003 Location: Sydney, Australia	nerds __________________ Politics, n. Strife of interests masquerading as a contest of principles. --Ambrose Bierce

11-12-2009, 07:57 PM	#16
JediKooter Coordinator Join Date: Dec 2004 Location: San Diego via Sausalito via San Jose via San Diego	Well, there's the problem...they are using the metric system. __________________ I'm no longer a Chargers fan, they are dead to me Coming this summer to a movie theater near you: The Adventures of Jedikooter: Part 4

11-13-2009, 09:47 AM	#18
fantom1979 College Benchwarmer Join Date: Apr 2008 Location: Sterling Heights, Mi	Nevermind, forgot the problem was area. Last edited by fantom1979 : 11-13-2009 at 09:50 AM.

11-13-2009, 01:06 PM	#22
Landshark44 High School Varsity Join Date: Feb 2006 Location: Atlantic City, NJ	i'm embarrassed that i can, barely, follow along..... and it's only 7th grade math but thanks for the help, i'm sure i'll have some more questions we can't figure out.... Last edited by Landshark44 : 11-13-2009 at 01:06 PM.

11-12-2009, 06:09 PM	#2
JeeberD General Manager Join Date: Nov 2002 Location: The Town of Flower Mound	18. 9 and 10 __________________ UTEP Miners!!! I solemnly swear to never cheer for TO

11-12-2009, 06:12 PM	#6
Landshark44 High School Varsity Join Date: Feb 2006 Location: Atlantic City, NJ	jeeberD, my boy has to show the work. do you have an equation that supports the answer? thanks

11-12-2009, 06:25 PM	#10
EagleFan Hall Of Famer Join Date: Nov 2000 Location: Mays Landing, NJ USA	dola: How long have you been in AC?

11-12-2009, 06:26 PM	#11
EagleFan Hall Of Famer Join Date: Nov 2000 Location: Mays Landing, NJ USA	double dola (and a thread jack): Any flooding problems in AC today? This rain seems like it's never going to end these past couple days.

11-12-2009, 06:27 PM	#12
Landshark44 High School Varsity Join Date: Feb 2006 Location: Atlantic City, NJ	thanks for the help, guys. i still have a question about #19, because my boy has not learned the quadratic formula. is there another way? thanks

11-12-2009, 06:28 PM	#13
Landshark44 High School Varsity Join Date: Feb 2006 Location: Atlantic City, NJ	i'm actually in brigantine, and yes, it's underwater......

11-12-2009, 08:37 PM	#17
Passacaglia Coordinator Join Date: Oct 2000 Location: Big Ten Country	For #20, there's no reason for the problem to mention four consecutive integers -- since the first one isn't used in the problem, only three are needed.

11-13-2009, 11:01 AM	#19
-apoc- H.S. Freshman Team Join Date: Mar 2006 Location: Satellite Beach, FL	You can use the FOIL method instead of the quadratic equation x^2 + x - 110 = 0 (x-10)(x+11)=0 X=10, X=-11 X=10 since it cant be a negative number __________________ Share and enjoy Last edited by -apoc- : 11-13-2009 at 11:02 AM.

11-13-2009, 12:34 PM	#20
Drake assmaster Join Date: Feb 2001 Location: Bloomington, IN	I would just like to add that as an English major, this thread has made me really hot for RPI-Fan, Radii and BishopMVP. And -apoc-. Mustn't forget -apoc-. Last edited by Drake : 11-13-2009 at 12:35 PM.

11-13-2009, 04:09 PM	#24
Apathetic Lurker College Prospect Join Date: Apr 2004 Location: Buffalo,NY	STOP.THE.MATH !!!!! my brain hurts

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