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• Math
The letters R, Q, N, and Z refers to a set of numbers such that: R = real numbers includes all real number [-inf, inf] Q= rational numbers ( numbers written as ratio) N = Natural numbers (all...

Asked by dariuszzacz on via web

• Math
The easiest way I have for knowing the difference between linear and nonlinear is the exponent value on the variable x. It is important to understand the root word in linear. It is LINE. A...

Asked by schnoop on via web

• Math
f(x) = 2x g(x) = x + 3 First let us find (fog)(x) (fog)(x) = f(g(x) = f(x+3) = 2(x+3) = 2x + 6 ==> (fog)(x) = 2x + 6 Now let us find (gof)(x): (gof)(x)...

Asked by seedrasoso on via web

• Math
Primary and secondary data fall within the scope of statistics and can be used as part of a research method. The collected data may assist a company in measuring, assessing and discussing the...

Asked by nkazie on via iOS

• Math
When you were 4 years old, your sister was half your age. Half of 4 is 2, your sister was 2 years old when you were 4 years old or she is 2 years younger to you. Your present age is 100, as your...

Asked by mimi101 on via web

• Math
Let x and y be the two numbersWe want x-y = 8 and xy=P as small as possibleAs you wrote, x=8+yOnce you have that, you can substitute into the other equation, and getP=(y+8)y = y^2 + 8yJust as you...

Asked by maythany on via web

• Math
A square and a rectangle each have 4 sides and 4 angles. The only difference between them is that a square is a rectangle with equal sides. Both have 4 90 degree (right) angles. A triangle has 3...

Asked by tweety38039 on via web

• Math
A linear function is one that has the form f(x) = ax + b. Here for each value of x there is only one corresponding value of f(x) and every value of f(x) is due to only one particular value of x. In...

Asked by beastmode303 on via web

• Math
Without people who can do math, we would not have many of the things we take for granted. We wouldn't have cars, highways, or plane travel--math is required to design and build such things. Tall...

Asked by jazmine on via web

• Math
We have to find the chain rule to find the derivative of f(x) = e^3x. The chain rule for the function f(x) = g(h(x)) gives f'(x) = g'(h(x))*h'(x). Here f(x) = e^3x f'(x) = e^3x * (3x)' => e^3x *...

Asked by sylli on via web

• Math
Use a linear function to approximate `125.1^(1/3)` : (1) Let `f(x)=x^(1/3)` (2) We will find a linear approximation to f(x) at x=125. (3) `f(125)=5` (4) `f'(x)=(1/3)x^(-(2)/3)` . This is the...

Asked by hockeyfan54 on via web

• Math
There are two different ways to graph that equation. 1. You can use the slope and y-intercept of the line to graph it. The slope is the number that is in front of x (in your example 5 would be the...

Asked by shelly-belly on via web

• Math
What you have to remember here is the formulas for area and circumference of a circle. The area of a circle is equal to the square of its radius times pi. The circumference of a circle is equal to...

Asked by george95 on via web

• Math
Real-life limits are used any time you have some type of real-world application approach a steady-state solution. As an example, we could have a chemical reaction in a beaker start with two...

Asked by onionandeva on via web

• Math
1 year consists of 365 days. 1 day has 24 hours, each hour has 60 minutes and each minute has 60 seconds. This gives the number of seconds in an hour as 60*60 = 3600 and the number of seconds in a...

Asked by kavthuv on via web

• Math
A very simple example of combinations would be in the number of pizzas one could create given a certain number of criteria. In other word, given that a pizza place has: 3 types of crust -thin,...

Asked by efferrc on via web

• Math
1. Construction of angle 105 degree using compass:(Refer attached image) Steps: Draw a line AB and mark point O on it where angle is to be drawn. With O as center draw an arc (semicircle) which...

Asked by saiabh360 on via web

• Math
An alternate approach to proving this identity involves using the "unit circle" (radius = 1). Since the radius is also the hypotenuse of the right triangle formed by the angle...

Asked by mathexpert on via web

• Math
In arithmetic the least common multiple (LCM) of two numbers a and b is the smallest positive integer that is a multiple of both a and b. So, the multiples of 3 are : 3, 6, 9, 12, ...The multiples...

Asked by bored1998 on via web

• Math
This question is a little vague. It's difficult to simply "verify" a given linear approximation without some parameters. Let's assume that it means that at `x = 0`, the logarithm and the...

Asked by mllysmith on via web

• Math
TThe ratio of boys to girls is 12 to 16, 12:16 or 12/16 (all different ways this can be written). The fraction form 12/16 can be reduced by dividing by the greatest common factor. Both 12 and 16...

Asked by maganda12 on via web

• Math
A fraction is really a division problem. One-third means ONE divided into THREE parts. So, to find the decimal equivalent, do the division. 1 divided by 3 = 0.33333333 etc. In a case like this,...

Asked by soccerchic96 on via web

• Math
How do you find the vertex of the graph of a quadratic function written in intercept form? Intercept form is also known as factored form: y=(x-p)(x-q) where p,q are the x-intercepts. One way to...

Asked by enotes on via web

• Math
First we need to calculate the area of the floor Since it is a rectangulal floor, then the area to be covered is L*I= 9*3=27 m ^2 =270,000 cm^2 Now we need to cover the area with (n)...

Asked by sixpenpencil on via web

• Math
Let the length be "L" and the width "W" We know that the ration is 5:3 Then, L/W = 5/3 Cross multiply: ==> 3L = 5W ==> L = (5/3)*W .......(1) Also, it is given that the perimeter P is 32:...

Asked by fourmetres on via web

• Math
`sqrt(3)sinx+cosx=1` `sqrt(3)sinx=1-cosx` `3sin^2x=1-2cosx+cos^2x` -- square both sides `3(1-cos^2x)=1-2cosx+cos^2x` -- Pythagorean relationship `4cos^2x-2cosx-2=0` -- clear parantheses and...

Asked by homeworkar on via web

• Math
`int "tan"^n x dx =` `int ("tan" ^(n-2) x) ("tan" ^2 x) dx =` `int ("tan" ^(n-2) x) ("sec"^2 x - 1)dx = ` `int ("tan" ^(n-2) x ) "sec"^2 x dx - int "tan" ^(n-2) x dx=` To do the first integral, use...

Asked by masterpiece56 on via web

• Math
We are given the equation x^2-5xy+3y^2=7 and we have to find dy/dx. Differentiating each term of x^2 - 5xy + 3y^2 = 7 with respect to x, we get 2x - 5x(dy/dx)- 5y + 6y(dy/dx) = 0 taking the terms...

Asked by drole on via web

• Math
Let, EQ.1 y = cos x EQ.2 y = sin x Solve the intersection points between the two equations. `y = y` `sin x = cos x`...

Asked by ctkh66 on via web

• Math
The answer depends on the margin of how badly you failed your final exam. Here is the equation to calculate your final average, if x=exam grade: .15x + 86 (.85) = Final overall average. So if...

Asked by reya66 on via web

• Math
Since the line is perpendicular to the x-axis, then, the line is vertical. And if the line passes throught the point (2,-1), hence the equation is x = 2. Answer: Equation of the line is x=2 .

Asked by omgscorex on via web

• Math
If a line has no y-intercept, that means it never intersects the y-axis, so it must be parallel to the y-axis. This means it is a vertical line, such as `x=3` . This slope of this line is...

Asked by yissy on via web

• Math
We know that the area of the circle is given as the following function: A = (r^2)*pi where r is the radius. But we know that: C = 2r ( c is the circumference) ==> r = C/2 Now substitute...

Asked by hannah555 on via web

• Math
The volume of a sphere is linked to its radius by the formula: `V=4/3pir^3` where V is the volume of the sphere and r is the radius. The rate of change of one value with respect to another is found...

Asked by dat692 on via web

• Math
Given that the number of boys and girls in a class is as follows: Number of boys = 11 Number of girls = 9 Then we conclude that the total number of students in the class= 20 students. Then, the...

Asked by carlosnas on via web

• Math
The circle should pass through the three points (-7,4),(-4,5) and (0,3) Call the center of the circle P. Then PA=PB=PC since all radii of a circle are congruent. PA=PB implies that P lies on the...

Asked by bobeep23 on via web

• Math
You need to expand the binomial using the formula `(a-b)^2 = a^2 - 2ab + b^2` . Hence, substituting x for a and 2 for b yields: `(x - 2)^2 = x^2 - 4x + 4` You may also use distributive...

Asked by soman2006 on via web

• Math
Evaluate `int (lnx)/x dx` : We ` `` `let `u=lnx` . Then `du=1/xdx` and we have: `intudu=1/2u^2+C` . Substituting for `u` we get `1/2(lnx)^2+C` . Thus the integral evaluates as `1/2(ln(x))^2+C`

Asked by homeschool11 on via web

• Math
Given `125.8<=mu<=152.6` : The confidence interval for the mean is of the form: `bar(x)-"error"<=mu<=bar(x)+"error"` where `bar(x)` is the point estimate for the mean. Here we have...

Asked by jjmgingrich on via web

• Math
Given `f(x)=1/3 x^3+1/2x^2+10` `f'(x)=x^2+x` Newtons method begins with a "guess", `x_1` , then proceeds towards the actual value using `x_n=x_(n-1)-(f(x_n))/(f'(x_n))` `x_1=-3`...

Asked by bilemem on via web

• Math
To round a number to the nearest digit we must look at the digit to the right of the number we are rounding to. In this case, since we are rounding to the nearest ones place, or units, we will look...

Asked by prinncess621 on via web

• Math
This equation is in the slope-intercept form y=mx+b where m is the slope and b is the y intercept. In the linear equation y=-5x-1, the slope is -5 and the y intercept is -1. Here is the graph:

Asked by ineedhelpinschool on via web

• Math
The square root of 169 is 13. This is so because 13 times 13 gives 169 -- the definition of a square root of a number k is the number such that when you multiply it by itself you get k. Note that...

Asked by jj12345678911 on via iOS

• Math
The equivalent resistance of two resistances connected in parallel is given by `1/R = 1/R1 + 1/R2` `R = (R1*R2)/(R1 + R2)` `(dR)/(dt) = ((R1*(dR2)/dt + R2*(dR1)/dt)(R1 + R2) - (R1*R2*((dR1)/dt +...

Asked by toby712 on via web

• Math
Translate the written/verbal expression "twice a number x" into mathematical/symbolic notation: Twice a quantity usually indicates to take two of the things in question; usually this indicates to...

Asked by poolfullof on via iOS

• Math
Given the equation: x^3+ x^2 + x +1 = 0 We need to find x values that satisfies the equation. First we will simplify by factoring. We will factor x^2 from the first two terms. ==> x^2 ( x+1) +...

Asked by kokibrazil on via web

• Math
First, rewrite each equation in slope-intercept form. 2x + y - 3 = 0 y = -2x + 3 x - y - 6 = 0 y = x - 6 -2x + y - 5 = 0 y = 2x + 5 Now graph the three equations...

Asked by mypstile on via web

• Math
Another way to answer this question is that you know any linear function can always be written y = mx + b, where m is the slope. Find m first, (4 - 3)/(2 - -1)=1/3. Then plug in one point to...

• Math
If 3/5 is 15, then 1/5 must be 5 (15/3). So 5/5 of that number would be 5 x 5 = 25. So 25 is your answer.

Asked by anime on via web