anonymous
  • anonymous
WILL FAN + MEDAL FOR 5 QUESTIONS!!!!
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
Which inequality models this problem? The length of a rectangle is three times its width. If the perimeter is at most 112 centimeters, what is the greatest possible value for the width?
anonymous
  • anonymous
@ParthKohli @mathmate @UnkleRhaukus
anonymous
  • anonymous
@UnkleRhaukus please help!

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anonymous
  • anonymous
My choice is D 2w + 2 • (3w) ≥112 2w + 2 • (3w) < 112 2w + 2 • (3w) > 112 2w + 2 • (3w) ≤112
UnkleRhaukus
  • UnkleRhaukus
what is a formula for the perimeter of a rectangle ? ( in term of length l, and width w)
anonymous
  • anonymous
No we dont have to solve it
anonymous
  • anonymous
We need to make/find the inequality
UnkleRhaukus
  • UnkleRhaukus
The perimeter is \[P = \ell+w+\ell+w = 2\ell + 2w\]
UnkleRhaukus
  • UnkleRhaukus
right ?
anonymous
  • anonymous
Am I right???? I think its D because at most is < with _ under it
UnkleRhaukus
  • UnkleRhaukus
hmm, that is a short cut yes
anonymous
  • anonymous
Well ueah but I have done the problem and I got D! Also like i said....... The at most sign is < with _ under it
UnkleRhaukus
  • UnkleRhaukus
yeah
anonymous
  • anonymous
Ok so am I right?
UnkleRhaukus
  • UnkleRhaukus
yes, yeah, maybe. YES
anonymous
  • anonymous
Really dude come on!
anonymous
  • anonymous
Yes or No!
UnkleRhaukus
  • UnkleRhaukus
As you say, the only difference between the options is the inequality sign, and ` ≤ ` is the same as ` at most `
anonymous
  • anonymous
Which inequality models this problem? Eduardo started a business selling sporting goods. He spent $7500 to obtain his merchandise, and it costs him $300 per week for general expenses. He earns $850 per week in sales. What is the minimum number of weeks it will take for Eduardo to make a profit?
UnkleRhaukus
  • UnkleRhaukus
is this another multiple-choice, where the options are the same up unto the inequality sign?
UnkleRhaukus
  • UnkleRhaukus
Yes / No / Maybe ?
anonymous
  • anonymous
300w > 7500 + 850w 850w > 7500 + 300w 850w < 7500 + 300w 850w ≥ 7500 + 300w
anonymous
  • anonymous
The choices
UnkleRhaukus
  • UnkleRhaukus
consider the weekly profit : sales - expenses how many week do you need to for the profit weekly profit * weeks to be greater than the cost of the merchandise
anonymous
  • anonymous
My choice is A
UnkleRhaukus
  • UnkleRhaukus
Consider, if A were true, would Eduardo ever turn a profit on the business?
anonymous
  • anonymous
yes
UnkleRhaukus
  • UnkleRhaukus
how many weeks (w), do you think?
anonymous
  • anonymous
15
UnkleRhaukus
  • UnkleRhaukus
let's check A: 300w > 7500 + 850w ? 300(15) > 7500 + 850(15) ? 4500 > 7500 + 12750 ? 4500 > 20250 ?
anonymous
  • anonymous
Well how would we get the inequality
UnkleRhaukus
  • UnkleRhaukus
consider the weekly profit : sales - expenses how many week do you need for the profit: weekly profit * weeks to be greater than the cost of the merchandise (sales - expenses)weeks > merchandise
anonymous
  • anonymous
C then
UnkleRhaukus
  • UnkleRhaukus
(sales - expenses)weeks > merchandise (sales)weeks - (expenses)weeks > merchandise (sales)w - (expenses)w > merchandise
anonymous
  • anonymous
B????? Dude, the 300 is at the end
UnkleRhaukus
  • UnkleRhaukus
how did they get get the + 300w as the last term on most of the options
anonymous
  • anonymous
ok I really dont understand
UnkleRhaukus
  • UnkleRhaukus
(sales)w - (expenses)w > merchandise (sales)w > merchandise + (expenses)w
UnkleRhaukus
  • UnkleRhaukus
expenses, right?
anonymous
  • anonymous
So it is B
anonymous
  • anonymous
Well am i right?
UnkleRhaukus
  • UnkleRhaukus
how many weeks does that correspond to?
anonymous
  • anonymous
8?
anonymous
  • anonymous
What do we have to do to solve it?
UnkleRhaukus
  • UnkleRhaukus
let's check B: 850w > 7500 + 300w 850(8) > 7500 + 300(8) ? 6800 > 7500 + 2400 ?
anonymous
  • anonymous
So its B??
anonymous
  • anonymous
Dude you litterally going around everything....
UnkleRhaukus
  • UnkleRhaukus
is 6800 > 7500 + 2400 ? is 6800 > 9900 ?
UnkleRhaukus
  • UnkleRhaukus
Where did you get the figure of 8 weeks from ?
anonymous
  • anonymous
6800>9900+12300
UnkleRhaukus
  • UnkleRhaukus
um
anonymous
  • anonymous
um what?
UnkleRhaukus
  • UnkleRhaukus
|dw:1443617828799:dw|
anonymous
  • anonymous
Ok dude is it B or not!
anonymous
  • anonymous
Hello????
anonymous
  • anonymous
@UnkleRhaukus
anonymous
  • anonymous
hello??????????????????????????

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