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algebra
I was wondering if my answer is right. Let f (x)=(x+10)^2. Find x so that f(x)=72 (x+10)^2=72 x^2+20x+100=72 x^2+20x+28=0 x=(20+sqrt(400112))/2 x=10+6*sqrt(2)
asked by dan on April 25, 2010 
Trig
Find the derivative. {sqrt(x+8)}*(x^2+20x) (x+8)^1/2(2x+20) minus (1/2)(x+8)^1/2(x^2+20x) I'm not feeling confident I am on the right track and I have a quiz tomorrow over this.
asked by Please Help on May 17, 2017 
Trig
Find the derivative using the product rule. {sqrt(x+8)}*(x^2+20x) (x+8)^1/2(2x+20) minus (1/2)(x+8)^1/2(x^2+20x) I'm not feeling confident I am on the right track and I have a quiz tomorrow over this.
asked by Anonymous on May 17, 2017 
math
5(3+4x)6>=129 I get 2 different answers on this one. 15+20x6>=129 15+20x6+6>=129+6 15+20x>=135 1515+20x>=13515 20x>=120 20x/20>=120/20 x>=6 Is this worked out properly, are there any shortcuts?
asked by barb on August 22, 2010 
Math
Find the intersection of two lines. i have the answer just please tell me how it was made 4x3y4=0 , 4x+2y+5=0 5y/5 = 9/5 y= 9/5 4x3(9/5)4=0 5(4x+27/54=0) 20x+2720=0 20x+7=0 20x/20=7/20 x=7/20 (7/20, 9/5
asked by Joy on July 1, 2014 
math
Tina has a pet sitting business. She charges a flat service fee of $20, plus $20 per day for each animal. If one of her customers spent less than $100 on one animal, which of the following inequalities could be used to solve for
asked by abella on December 7, 2018 
Hyperbola's vertics? and parabola's orientation
y^2= 9(x^2)+20x+3 how to identify its orientation and the locaation of its vertices? sqrt(x^4+8x^3)=sqrt(9x^2+20x+3) How to identify the parabola's orientation? up or down? thank you
asked by jay on May 21, 2007 
math,correction
Directions:Multiply Problem: ((x)/(3)+(3)/(4)) ((3x)/(4)(3)/(5)) so the answer for it i got: ((20x^2+20x36)/(80)) I worked it and I have what you have EXCEPT 29x instead of 20x. If you can't find the error, post your work and we
asked by Jasmine20 on January 24, 2007 
Algebra 1
Are these right? xy  3x  8y + 24 (3xy)(8y+24) 8y+24 4x^2 + 20x + 5y +xy 36x+(5y+x) 36x5y I don't think so it's right.Your question xy3x8y+24 is itself the answer.It cannot be further calculated bcause it doesn't have the
asked by mike on March 8, 2007 
Microbiology
You need 3.5L of 50mM NaCl from your 20X stock. How would you accomplish this: 20X stock __________ml Pure Water ___________ml From whatever number I plugged in trying to solve it, I got: 175ml of 20X stock and 3,430ml of Pure
asked by John on March 27, 2013