Mathematics

375 is 62 1/2 of what number? 30 is 25% of what number

here ,375= 62 *(1/2) of x or, 375=31 of x or, x = 12.09 from second case,30 = 25 % of x or, 30= (25/100) of x or x= 3000/25 or, x= 120 they are the respective answers-375 is (=) 62 1/2 (62.5) of (*)

What percent of 8 is 7? what percent of 8 is 12?

you want to know 8*(what)=7 => (what number)=7/8=.875 so 7 is 87.5 percent of 8 8*(what number)=12 => (what number)=12/8=1.5 so 12 is 150% of 8-7 is 7/8 of 8 which is the decimal .875 which is 87.5%

Find roots of these polynomials

Summer assignments and omgomg its due next week. IDK how to do this one. #10 Given f(x) = x^4 - 3x^3 - 2x^2 - 7x - 10 Find all roots to the nearest 0.001 #11 Given f(x) = 4sin(x) - 5x + 2 Find all

Why is this series convergent

Here are the pictures of the problem I am talking about. http://www.flickr.com/photos/venom104 . I get that the first term is a geometric series and is convergent because r So if that theorem is tru

How to I factor the following polynomial

x^3 - 5x^2 + x - 5 SHOW ALL Work please! I dont want the answer but the guidelines to solving this. I have the answer in this textbook in front of me. (Test tomorrow)-x³ - 5x² + x - 5 = x³ + x - 5(x

-4 SR(x + 9) = 20? Please help me!

I need help finding x, and if the solution is extraneous or not. The only question out of 10 I cant solve. please help.-Divide both sides by (-4): sqrt(x+9) = -5 Square both sides: (x+9) = (-5)^2

What is 10% of 75,000

And how do I figure that? How do I find a percent?(show work)-75000 X 0.10-10% of 75,000 is 7,500. If you were actually to show work for this on a math test and such it would be written as: (0.10)(7

Free Falling Limit / Position Math Question (Calc1)

Given: s(t) = -16t^2+1000 lim t->a = (s(a) - s(t)) / (a - t) Drop from 1000 feet a) When will it hit the ground? b) At what velocity will it impact?-16t² = 1000 t² = 62.5 t ≈ 7.906 s s(t) = -32t s

How many solutions are there to the equation 0 = 0

Having more trouble on these. Anyone know this one as well?-An infinite number of solutions.For exampleif 0=0 then 0x=0x so no matter what number you put in for x, it will still be true.-Yes, and I an

Help with geometry probs

A silo is shaped like a cylinder with a cone on top. The radii of the bases of the cylinder and cone are both equal to 8 feet. The height of the cylindrical part is 25 feet and the height of the cone

Can someone explain to me this maths probability answer

About 5 years ago, this question i got wrong in a maths test. there was a scale of 0-1 of probabilities, and the question was what is the chance of a black car being the first car of the day passing a

Can someone answer these Algebra questions for me

what does 4.6/10 equal and what does 4.7-1 equal ?-4.6/10= .46 4.7-1= 3.7

If 1,200 is returned on an investment of $950 what percent of the investment was returned?

% OF investment returned = (1250/950)*100 ≈ 131.58% return ON investment ≈31.58%

How do you deal with negative square root

If you found the answer to an equation in the form of a negative square root, (e.g. sqrt -4), what do you state (in an exam paper) to show that it is not a valid value? Thanks!-sqrt -4 could be shown

A spherical balloon is being inflated at a rate of 27π in³/sec

How fast is the radius of the balloon increasing when the radius is 3 in?-dV/dt = 27pi in^3/sec V = (4/3) * pi * r^3 dV/dt = 3 * (4/3) * pi * r^2 * dr/dt dV/dt = 4 * pi * r^2 * dr/dt r = 3 dV/dt = 2