Mathematics

If 3men with 4 boys earn rs.2700 in 4 days and 2 man with 3 boys earn rs.1900 in same time , in what time wil

4 men and 4 boys earn rs.8000?please explain the sum and show the solution.-3m + 4b = 2700 / 4 per day 3m + 4b = 675 per day 2m + 3b = 1900 / 4 per day 2m + 3b = 475 per day Two equations and 2 unkn

Geometry question help

At one point in a drag race, Chuck was 15 feet behind Sally and 18 feet ahead of Lucy. Lucy was trailing Kyle by 30 feet. By how many feet was Sally ahead of Kyle?-There are multiple ways, Ill give yo

Need help for this word problem... 10 points for being helpful.

4 Question: Based on the answer to question 1 and 2, make a guess on the number of seconds for the green light when the average is 20 vehicles per light cycle. Then calculate the number of seconds USI

Please help solve 16/21 divide 15/14 times 5/4

Its been a long time since Ive done fractions.-16/21 divided by 15/14 x 5/4 = 16/21 divided by 75/56 = 16/21 x 56/75 = 128/225.-[(16/21)*(14/15)]*(5/4)=(32/45)*(5/4)=8/…-(16/21)/(15/14)*5/4= (16/21)*(

Math problem help please!

Bob gave 4/5 of his pencils to Barbara, then he gave 2/3 of the remaining pencils to Bonnie. If he ended up with 10 for his self, how many did he start with?-x = initial amount Bob gave 4/5 of X away

If x, y, and a are positive numbers such that xy = a^2 + 1, then show that

tan^-1 (1 / (a + x)) + tan^-1 (1 / (a + y)) = tan^-1 (1 / a) for all acute angles. Hence deduce that tan^-1 (1 / 2) + tan^-1 (1 / 3) = pi / 4 and tan^-1 (1 / 3) + tan^-1 (1 / 5) + tan^-1 (1 / 7) + tan

How to find the limit of this function as x approaches 1

1/(x-1) - 2/(x^2-1) Ive been stuck on this problem for days. Finding common denominator, factoring, cancelling, it isnt working. Help, please :(-Common denominator: [(x+1) - 2]/(x^2-1)= (x-1)/(x^2-1)

How can I master calculus without selling my soul

you can master calculus if you study hard...if....you just need a strong foundation in algebra, trigo, analytic geometry and also you should study and understand truly the notion of limits....hope thi

What could f(x)= negative infinity as x approaches negative infinity look like graphed

Had a problem on my Cal test today that asked me to give a possible graph that would satisfy several limits. f(0)=0, f(x)=4 as x approaches infinity, and f(x)=negative infinity as x approaches negati

Discrete Math Question: In this case should I insert the specific case

One of my HW problems says H(x) = x is a hero, P(x) = ... If a question asks me to turn Tarzan is a hero into symbolic logic, would I simply write H(x) OR would I write H(Tarzan)?Please explain why.

5th grade math need help! 10 pts!

okay here is the question, Lamont walked 2.7 miles on saturday.On sunday he road his bike 2 and two third miles. On which day did he travel more miles?-Saturday 2.7 > 2.66666666-On Saturday, Lamont w

Factor by grouping to find a difference of squares

x^2 - y^2 - 2yz - z^2 Answer: (x+y+z)(x-y-z)-Hi, x² - y² - 2yz - z² = x² - (y² + 2yz + z²) = x² - (y + z)² = (x - (y + z))(x + (y + z)) = (x - y - z)(x + y + z) I hope that helps!! :-)-x^2 - y

Help express 2^12 in base 2 and base 10

base 10 is just the ordinary number system we use. Just put 2^12 (2 to the power of 12) into your calculator. For base 2, you need to express it as: a[n] 2^n + a[n-1] 2^(n-1) + ... + a[1] 2^1 + a[0]

Why is modern number system called "arabic numerals" even though it was invented by Indians

The wikipedia article gives a brief history to explain it http://en.wikipedia.org/wiki/Arabic_nume… it gives a direct answer to your question: The reason they are more commonly known as Arabic numera

How would you solve x^2=9x

Im totally stumped... please help? :/-x^2=9x x^2-9x=0 x(x-9)=0 x=0; x=9-X^2=X*X 9X=9*X so... X*X=9*X divide both sides by X X=9 that was a little drawn out but it should work