• ### Nancy ran a distance of 5 km in 30 minutes. What is her speed in meters (m) per hour (h)?

17 answers · 1 day ago
• ### What does <50 degrees mean?

20 answers · 3 days ago
• ### 3x +1 =x-5 over 2?

7 answers · 16 hours ago
• ### What does an uppercase number look like?

You know how there are uppercase and lowercase letters? Assuming that the numbers we have now are lowercase, what do uppercase numbers look like?
You know how there are uppercase and lowercase letters? Assuming that the numbers we have now are lowercase, what do uppercase numbers look like?
9 answers · 1 day ago
• ### Find the domain and range of f(x) = (|sinx|)^2?

Best answer: The domain would be all real numbers, since I don't see any restrictions. For the range, start with the inner function: sin(x) oscillates between -1 and 1 (inclusive) If you take the absolute value, the negative values (-1 to 0) will end up 0 to 1. |sin(x)| goes between 0 and 1 (inclusive) If you then square... show more
Best answer: The domain would be all real numbers, since I don't see any restrictions.

sin(x) oscillates between -1 and 1 (inclusive)

If you take the absolute value, the negative values (-1 to 0) will end up 0 to 1.
|sin(x)| goes between 0 and 1 (inclusive)

If you then square a number between 0 and 1, it can't get smaller than 0 or bigger than 1. It will still be in that range.
|sin(x)|² goes between 0 and 1 (inclusive)

Domain is all real values of x --> (-∞, ∞)
Range is 0 ≤ y ≤ 1 --> [0, 1]
6 answers · 12 hours ago
• ### Is 1/5 greater than or less than 2/10?

45 answers · 7 days ago
• ### What is halfway between 4/5 and -2/3? please show solution?

8 answers · 2 days ago
• ### Where can I relearn my maths skills online?

So I've realised that I've not really done any maths since I left school 10 years ago. I have pretty much forgotten how to do both written and mental addition, subtraction etc.. They are important for employment. Where can I go to relearn these from the beginning?
So I've realised that I've not really done any maths since I left school 10 years ago. I have pretty much forgotten how to do both written and mental addition, subtraction etc.. They are important for employment. Where can I go to relearn these from the beginning?
6 answers · 10 hours ago
• ### Two positive numbers differ by 54. Their product is 715. What is the smaller number?

11 answers · 3 days ago

8 answers · 2 days ago
• ### Find an equation of the line tangent to the graph y = (|sinx|)^2 at the point where x=pi/4?

Best answer: y = sin²x with x = π/4 absolute value is irrelevant when something is squared. y' = 2sin(x)cos(x) y'(π/4) = 2sin(π/4)cos(π/4) = 2(1/√2)(1/√2) = 2/2 = 1 so the slope at x = (π/4) is 1 and y at (x=π/4) = (1/√2)² = 1/2 so we have a point and a slope Point-slope form y – y₁ = m(x – x₁) y – (1/2) = 1(x –... show more
Best answer: y = sin²x with x = π/4
absolute value is irrelevant when something is squared.

y' = 2sin(x)cos(x)
y'(π/4) = 2sin(π/4)cos(π/4) = 2(1/√2)(1/√2) = 2/2 = 1

so the slope at x = (π/4) is 1
and y at (x=π/4) = (1/√2)² = 1/2

so we have a point and a slope

Point-slope form
y – y₁ = m(x – x₁)
y – (1/2) = 1(x – π/4)
y = x – (π/4) + (1/2)
or
y = x – (π–2)/4
or
4y = 4x – π + 2
5 answers · 12 hours ago
• ### How do you differentiate fractions and square roots of numbers? 10 pts?

eg how do you differentiate these three: x^(1/3) √x x^(-2/3)
eg how do you differentiate these three: x^(1/3) √x x^(-2/3)
7 answers · 2 days ago
• ### 4x-4/2=4 please explain how to do?

9 answers · 3 days ago
• ### Why is √x equal to x^(1/2) ?

Best answer: Because as for example the square root of 4 is the same as 4 to the power of 1/2 which is 2 in both cases.
Best answer: Because as for example the square root of 4 is the same as 4 to the power of 1/2 which is 2 in both cases.
6 answers · 20 hours ago
• ### Halfway number for 1630 1730?

9 answers · 3 days ago
• ### How do I convert 77° C to degrees Fahrenheit?

Best answer: 77 = (5/9) * (F - 32)
77 * (9/5) = F - 32
77 * (9/5) + 32 = F
693/5 + 32 = F
138.6 + 32 = F
170.6 = F
Best answer: 77 = (5/9) * (F - 32)
77 * (9/5) = F - 32
77 * (9/5) + 32 = F
693/5 + 32 = F
138.6 + 32 = F
170.6 = F
6 answers · 1 day ago
• ### If 3/16 equals 1 foot, are there (4) 3/16 in one inch?

10 answers · 4 days ago
• ### One minutes?

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6 answers · 1 day ago
• ### If a and b are real numbers, then the product of (a-bi)^2 is?

a) always real b) sometimes, but not always, real c) always imaginary d) sometimes, but not always, imaginary
a) always real b) sometimes, but not always, real c) always imaginary d) sometimes, but not always, imaginary
4 answers · 6 hours ago