Mathematics

How do you find the percentage of something

for instance,If a couple went out for the evening and spent 13.50 and sixty percent went for the drinks how much would each drink be?how would you find the answer?-Percentages are simple.All a percent

Simultaneous equations help please!

7x-3y=27 y= 4 - 2x can some please help me with this-7x-3y=27 y= 4 - 2x Substitute the second equation into the first equation: 7x - 3(4 - 2x) = 27 7x - 12 + 6x = 27 13x = 39 x = 3 y = 4 - 2x y =

A few questions about pi, can the center or diameter of a perfectly round circle be found if pi is unknown

If the center and diameter can be found then pi is finite. Also does pi grow or shrink as it is further calculated, is it headed toward infinity or negative infinity, pi being finite? If pi is infinit

What is her weekly pay before deduction

lynn earns take-home pay of $925 a week. if her deductions for taxes, retirement & medical plan amounts to 26% of her weekly pay. what is her weekly pay before deduction?-solution = Given: Take home

Math help please!!!!!!

Hi Yahoo answers please help me? I have a test on conic sections. I have to know how to identifythem a ellipse,circle,hyperbola, or parabola. I haveNO idea how to recognize them. PLEASE help me. I to

Calculus Problem Using Second Derivative Test

In my final exam review packet for my college calculus class, one of the problems is really giving me trouble. The directions for the problem are: Find all relative minimums and maximums for y= x^4

MATH HELP!!!! please?!?!?!?!?!?!?!?!

The sun of two numbers is 18. The difference between three times the smaller number and the larger number is 10.A. Define variables and formulate a system of equations from thisSituation B. What is th

What are the steps to solve this quadratic equation by factoring

y= x²- 5x- 14 Please show me simple steps!-y = x²- 5x- 14 y = x² - 7x + 2x - 14 y = x(x - 7) + 2(x - 7) y = (x - 7) (x + 2)-take a factor pair of 14 such that you can combine them by adding or subtra

What is the general form of y= x²- 5x- 14

(x-7)(x+2)-it is an upward parabola with its vertex at (5/2, -121/4)-X-19-general form is:y=ax^2+ b x+ c

Please help me: Find lim(x,y)->(0,0): xy/x+y

What Ive done is: Suppose xy>0 (|x| - |y|)^2=x^2+y^2-2|xy| => |xy| = Then we know that sqrt(x^2 + y^2) = => lim(x,y)->(0,0): xy/x+y =(0,0): (x^2 + y^2)/sqrt(x^2 + y^2) = lim(x,y)->(0,0): sqrt(x^2 + y^

How do you complete the square of y = x²- 5x- 14

Ill start you off but, I wont do your homework for you totally. (x-7)(x+2) Heres the explanation of how I got the above.You need to find two numbers that multiply together to get 14 and when you sub

Solve the system using the inverse method.

Solve the system using the inverse method. {-2x + 3y + 2z = 1 {x - y = 4 {y + 3z = -3-x=37 y=33 z=-12

Power series to estimate ...within .001

integral (1-cos x)/x dx . limits 0 to 1/3. use power series to estimate the integral to within .001 i tried to solve it and i am kinda stuck on the last part. i got x^2/4 -x^4/(4)(4!) + x^6/ (6)(6!)

Where Do We See Parabolas in Everyday Life

Please explain in 2 to 3 paragraphs. :)-The trajectory of a projectile and radar and satellite dishes are a coupla things we see that resemble a parabola. The St. Louis arch and a hanging rope form a

Factoring please help ? 10 points

EXTRA :FACTORING BY GROUPING 2/3bc-14/3b +c -7 n^ + 2n +3mn +6m 2ax^+bx^-2ay^-by^ yz^-y cubed +z cubed -y^z y cubed -y^-4y+4 x^a +x^b-16a-16b Id really appreciate it if you showed the work so