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This is rather about the concept: 1) Identity means both sides are equal no matter what the value x will take. example: 2+x=x+2 2) inconsistent: means the equation is not true regardless the x value. example: 2+x=3+x 3) conditional: The equation is true a...

17 years ago

1) divide both sides by 25, we get x^2=13/25 take square root x = +/- sqrt(13/25) sqrt means square root. example: sqrt(5) means square root of 5. 2) The same kind of problem: divide by 2 on both sides: (x-5)^2 = 3/2 take square root: x-5 = +/- sqrt(3/2)...

17 years ago

Let Total be x 1) Pink (1/2)x remain (1/2)x 2) pink (3/4)*(1/2)x remain (1/4)(1/2)*x 3) Orange (1/2)(1/4)(1/2)x remain: (1/2)(1/4)(1/2)x So the red is (1/2)(1/4)(1/2)x Which is one-16th of the whole thing, which is 16.7% Contact me for quick homework help...

17 years ago

Tim, This can be done very easily by BASICS of Tangent function: Tan has a period of PI, which is 180 degree. When you have a angle like 225, all you need to do is add or subtract multiples of 180(in this case, 150 itself) to get a common angle: 225-180 =...

17 years ago

replace 150(in the parenthesis) by 180 in my last post, that was a typo.

17 years ago

Your problem is a wrong one. tenth is the first decimal digit.

17 years ago

1. Do you exercise or work out on a regular basis? no 2. Are you male or female? male 3. Do you smoke? no 4. How many carbonated soft drinks do you consume in a week. none 5. Do you drink coffee. occasionally 6. How many servings of fruit, or fruit juice...

17 years ago

This is the reason, using 1/2 + 1/3 as example: the denominator means the number of equal parts you divide the whole thing into. 1/2 means you divide the whole thing into 2 equal parts and you take one part. 1/3 means you divide the same whole thing into...

17 years ago

The standard notation for the length of medians: a=(1/2)*sqrt(2C^2+2B^2-A^2) b=(1/2)*sqrt(2C^2+2A^2-B^2) c=(1/2)*sqrt(2A^2+2B^2-C^2) square both sides: a^2=(1/4)*(2C^2+2B^2-A^2) b^2=(1/4)*(2C^2+2A^2-B^2) c^2=(1/4)*(2A^2+2B^2-C^2) multiply 4 on both sides:...

17 years ago

this line goes through origin. So the y-intercept is 0

17 years ago

Find the distance formula in the textbook and plug in numbers.

17 years ago

surface area = 2x^2 + 4xh where x is the length of the side and h is the height. let x= 1/3h Then 224 = (2/9)h^2 + (4/3)h^2 solve it h = 12 then x = 1/3 h = 4 So the length is 4 and height is 12

17 years ago

x^2-10x+25

17 years ago

hint: how are diameter and circumference related? How are radius and diameter related?

17 years ago

a math expression has meaning in it, it is not just a bunch of operations. The older of operations is a set of rule that everybody will follow so that we have a solid foundation to communicate with each other so that the meaning in an expression can be de...

17 years ago

Linear model mean the rate of change is constant. SO the rate is (4.4-24.3)/45 = 0.442 a) So the model function is f(t)=24.3 -0.442t b)in year 1975, t=30 f(30)=24.3-0.442*30 = 11.04 about 11 million. c) in year 1980, t=35 f(35)=24.3-0.442*35 = 8.83 millio...

17 years ago

Yes it is suppose to be f(n) = n^2 + 4n is O(n^2) : Hi, I assume n>1. let g(n)=n^2 This is straight forward according to big O notation. f(n) = n^2 + 4n <= n^2 + 4n^2 = 5n^2 That means |f(n)|<=C|g(n)| where C is a constant. According to big O definition f...

17 years ago

Here is the answer: Let S represent the sum of the expression then: S = 1/5 + 1/5^2 +... + 1/5^n ---- (a) multiply both sides by 1/5 (1/5)S = 1/5^2 + 1/5^3 +.. + 1/5^n + 1/5^(n+1) ---- (b) use equation (a) subtract equation (b) (4/5)S = 1/5 - 1/5^(n+1) mu...

17 years ago

Hi, You need to draw f(x) =1/x first and then transform it to f(x) = (1/x) - 4 To draw f(x) = 1/x, all you need to do is find several points, example: let x=1, then f(1)=1, you get one point (1,1) let x = 0.5, f(0.5)=1/0.5=2, another point (0.5,2). Try to...

17 years ago

You need to isolate P from the rest. Basically you do opposite operations to isolate a variable. In this case, subtract 5/3 on both sides: then P = q - 5/3

17 years ago

Yes, it is right.

17 years ago