• ### Finding dimensions of a rectangle?

The length of a rectangle is three times it’s width . If the perimeter of the rectangle is 48yd Length: Width :
The length of a rectangle is three times it’s width . If the perimeter of the rectangle is 48yd Length: Width :
7 answers · 2 days ago
• ### There are 10 kinds of people. Those who understand binary, and those who don't. Which are you?

7 answers · 2 days ago
• ### Simple math question? How much time per question?

You have 7 minutes to complete 20 questions. How much time do you have per question?
You have 7 minutes to complete 20 questions. How much time do you have per question?
7 answers · 2 days ago
• ### Pls help I am bad at math how to do 4.56 divided by 3?

I don't understand how to do this help!!!1!!!!!!!!1
I don't understand how to do this help!!!1!!!!!!!!1
7 answers · 2 days ago
• ### Math word problem!?

Best answer: "If the speed limit is 60 miles per hour, and your trip takes two hours, how much time will you save by traveling 65 miles per hour?" assuming that the two hours is at the speed limit. So the distance is 120 miles. At 65 mi/hr: 120 mi / 65 mi/hr = 1.846 hr. saving is 2 – 1.846 = 0.154 hr or 9.23 min or 9... show more
Best answer: "If the speed limit is 60 miles per hour, and your trip takes two hours, how much time will you save by traveling 65 miles per hour?"

assuming that the two hours is at the speed limit. So the distance is 120 miles. At 65 mi/hr:
120 mi / 65 mi/hr = 1.846 hr.
saving is 2 – 1.846 = 0.154 hr or 9.23 min or 9 min 14 sec
5 answers · 1 day ago
• ### Problem of the week?

5 answers · 6 hours ago
• ### Maths help?

How do I prove: For x any integer greater than 2, the expression x^3 - x is always divisible by 6 Thanks in advance!
How do I prove: For x any integer greater than 2, the expression x^3 - x is always divisible by 6 Thanks in advance!
6 answers · 1 day ago
• ### Which of the following purchases would cost most?

6 answers · 2 days ago
• ### 49 CC HOW MANY WATTS?

5 answers · 12 hours ago
• ### Can I take Calculus II if I don't remember anything from Calculus I?

Best answer: If you have any math skills you can probably review Calc I on your own. But that totally depends on your math skills, ... My Calc 1 was about the first 7 chapters in a really big book and Calc 2 was the next 7 chapters. Just buy the book and start in. Force yourself to work every day on it.
Best answer: If you have any math skills you can probably review Calc I on your own. But that totally depends on your math skills, ... My Calc 1 was about the first 7 chapters in a really big book and Calc 2 was the next 7 chapters. Just buy the book and start in. Force yourself to work every day on it.
5 answers · 2 days ago
• ### I only like 9s and 10s but im a 2?

5 answers · 3 days ago
• ### What was the time 1/4 of an hour before 1:00?

5 answers · 19 hours ago
• ### How do you solve this equation?

Best answer: Let T = (2x^2 - x – 3)/(x^2 - 1) * (x^2 + x – 2)/(2x^2 + x - 6)
Look for factors in numerator and denominator
T = [(x + 1)(2x – 3)(x – 1)(x + 2)]/[(x + 1)(x - 1)(x + 2)(2x - 3)]
It is now obvious that all factors cancel out, so that T = 1
Best answer: Let T = (2x^2 - x – 3)/(x^2 - 1) * (x^2 + x – 2)/(2x^2 + x - 6)
Look for factors in numerator and denominator
T = [(x + 1)(2x – 3)(x – 1)(x + 2)]/[(x + 1)(x - 1)(x + 2)(2x - 3)]
It is now obvious that all factors cancel out, so that T = 1
4 answers · 21 hours ago
• ### What is the easiest way to work out this math problem? 3/7 of 5 is the same as 5/7 of 3. Is this statement true or false?

13 answers · 5 days ago
• ### CALCULUS TANGENT HELP?

Best answer: Your update is rather confusing, I think you meant y = x³ - 3x² + 2x + 4 y = x³ - 3x² + 2x + 4 y' = 3x² - 6x + 2 If the tangents are parallel, then y' is equal at both locations, i.e. 3a² - 6a + 2 = 3b² - 6b + 2 = m Where m is the gradient of the tangent. 3a² - 6a + 2 = m 3a² - 6a + 2 - m = 0 This will... show more
y = x³ - 3x² + 2x + 4

y = x³ - 3x² + 2x + 4
y' = 3x² - 6x + 2

If the tangents are parallel, then y' is equal at both locations, i.e.
3a² - 6a + 2 = 3b² - 6b + 2 = m
Where m is the gradient of the tangent.

3a² - 6a + 2 = m
3a² - 6a + 2 - m = 0

This will have 0, 1 or 2 roots. Obviously, 3b² - 6b + 2 = m has the same roots. So if a and b are different, then they must represent the 2 different roots in the 2 roots case.

So we consider the case that 3a² - 6a + 2 - m = 0 has 2 roots.

let those roots be r and s

The sum a + b is then r + s

We can factor 3a² - 6a + 2 - m = 3(a - r)(a - s) = 3a² - 3(r + s)a + 3rs

The coefficient of the a is -3(r + s), so therefore -3(r + s) = -6, or r + s = 2

Therefore a + b = 2
4 answers · 23 hours ago
• ### Coin flip probability question?

4 answers · 24 hours ago
• ### A dumb question I know, anyways how many pounds is a 4oz chicken? & thank you in advance for all the smart *** answers:) & the **** talking?

6 answers · 1 day ago
• ### Hi this is not a joke. my calculator is broken so can you help me figure out 9 plus 10. Thank you?

26 answers · 1 week ago
• ### Complete the following trigonometric identity: cos(-x) =?

Best answer: cos (-x) = cos (x)
Best answer: cos (-x) = cos (x)
4 answers · 1 day ago
• ### Math problem?

the sum of a number and its reciprocal is 13/6. Find the number
the sum of a number and its reciprocal is 13/6. Find the number
10 answers · 5 days ago