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RAtio and proportion

If x is the mean proportional of 4 and 9, then x could be....._______? choices: a)4 b)3 c)6 d)36 didnt kno how to solve this, HOW do you solve this?-a:b:c Here, b is the mean proportional. The fo

Solving the equation by using the LCD?!?!

1/x=1/2+2/x Please show steps! Thanks!!(:-1/x=1/2+2/x isolate x to get all x terms on one side 1/x - 2/x=1/2 combine like terms -1/x=1/2 1/x=-1/2 cross multiply -x=2 x=-2-1/x = 1/2 + 2/x Mult

A simple derivative question

The height if a cone is decreeing at 3cm/s while its radius is increasing at 2cm/s . When the radius is 4cmand the height is 6cm , is the volume of the cone increasing or deceasing? At what rate is th

10 POINTS- Quick question? I forgot how to do it please help, thank you

50 times 2 2/9 = 111.11 (the 2/9 is a fraction) like I cant put that into a calculator. 50 times 2 is 100. how do you times 50 and 2 2/9 to equal 111.11?-First convert the 2 2/9 to an improper fract

How do I find the X values of "e^x - e^(-x) = 0 " and " - (1/e^x) + e^x = 0"

I never found this type of equations before. If someone could tell me how they are solved and hopefully even tell me whats the name of this type of equation so I can check it into google or something.

Conic Sections Ellipse Question

So Ive completely forgotten everything about conic sections since this last summer where I took Calc 1. This seems pretty easy and whatnot but heres the questions: (x+3)^2/25 + y^2/12=1 Find: Center

Find the following power series

Please help me find the sigma notation for any of the following expressions: x/(1-x) 2*(cos(x^2)) ln(1-x) 1/(1+x)^2 Thank you!!-Assuming these series are to be centered at x = 0: 1) Starting wi

Quick math problem! 10 points to BEST answer 1st!! :)

Consider the rectangle PQRS with vertices at P (-1, -1), Q (7, -1), R (7, 3) and S (-1, 3). For each step, draw the newly transformed shape and record the vertices. You have translated rectangle PQRS

A question about 2 samples proportions hypotheses

When we doing the hypotheses, we have two assumptions: one is the sample must be independent ; one is meeting the CLT. But why? is it related to the normal distribution?-How can you find the probabili

1 math homework problem:( please help! 10 POINTS TO BEST ANSWER 1ST

Consider the rectangle PQRS with vertices at P (-1, -1), Q (7, -1), R (7, 3) and S (-1, 3). For each step, draw the newly transformed shape and record the vertices. Translate rectangle PQRS down 2 un

Calculus - A plane flying with a constant speed of 4 km/min passes over a ground radar station at

A plane flying with a constant speed of 4 km/min passes over a ground radar station at an altitude of 4 km and climbs at an angle of 25 degrees. At what rate, in km/min, is the distance from the plane

Math?? :/ Help please?!

Solve: x^3-64 Solve. Provide answers in interval notation 2x+3/x-3 Find the line of symmetry: f(x)=2x^2-16x+33 If you dont know how to do all of them thats fine.. thanks guys!-the first one is x=

Maths problem i cannot figure out.. help!

Sunspot Problem: For several hundred years, astronomers have kept track of the number of solar flares, or sunspots, which occur on the surface of the sun. The number of sunspots counted in a given yea

How to find the x and y intercepts in an inequality

How would you find the x and y intercepts in 120 ≤ x + y ≤ 400 for example.-The x intercepts occur when y = 0. That leaves 120 = Similarly for y intercepts which occur when x = 0. EDIT. Yes, each s

X and y intercepts help.

1. What is the x and y intercepts of 7x-8y=168. 2. What is the slope of the line 2y=x+2. 3. What is the slope of the line 5x+3y=3 20x+12y=0 4. what is the slope intercept form equation ofm=6/7, (
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