Mathematics

What is the probability that a sample of 10 baggage items weighs more than 150kg in total

The airline has found from past experience that the weight of checked-in baggage items is Normally distributed with mean 13 kg and standard deviation 3.1 kg. Any assistance would be appreciated I hav

Solve algebra problem

a train leaves at 3 pm, second train leaves at 7pm. the second one is 44 mph faster than first. the second overtakes the first at 11pm. what is the speed of each train-As far as i know it is impossibl

How to find the x intercepts of y= -x(x+2)^2 +16

10 points, thanks.-When y = 0, 0 = -x(x+2)^2 +16 x(x+2)² − 16 = 0 x(x²+4x+4) − 16 = 0 x³ + 4x² + 4x − 16 = 0 x = 1.39.-/the easiest way is too graph it and where the line crosses the x axis each

Help solving this easy algebra question

7x = 3x + 39 Solve for x Please explain the answer too. Thanks-to isolate x on one side, simply subtract 3x from both sides 7x-3x = 3x-3x+39 so4x=39 then to get x alone you divide both sides by 4, s

How to solve (2/x+1)+(3/5x+5)=0

I have some algebra homework and Im having trouble with fractional equations.-(2/[x + 1]) + (3/[5x + 5]) = 0 10x + 10 + 3x + 3 = 0 13x = - 13 x = - 1 Answer: x = - 1 Check: (2/[- 1 + 1]) + (3/[5{- 1

What does this line mean

log ab^4 ^-1....does it mean that log ab^4 is multiplied by -1?-Here I wrote it out: http://imgur.com/Apme2 It implies that there is brackets before the -1 and its a power indicated by the ^

What is the derivative using the definition of derivative f(x+h) - f(x) all divided by h

f(x) = x^3 - 3x + 5. I know the derivative is 3x - 3 but I need to prove it using the definition above. When I do it and cancel out terms I end up with a negative 3 and an extra x in the derivative (w

Algebra 1 questions, help please

We have to solve the following systems of equations for x and y (we have to try and find the solution of the equations) y=x/2+1 2y=x-2 --> i simplified to y=x/2-1 ( i think its right) then ur suppos

Math help ! input output pleaseeeee

My son needs help and I am horrible at math. Id like to explain the process so he understands it. Please help us answer these questions. Does the table represent a function? 1 3 2 4 3 5 4 6 1 3 2 3

Factor the polynomial completely. x(y+37)+z(y+37)

= (y+37) (x+z) done :)-take y+37 common x(y+37)+z(y+37) (y+37)(x+z)-(x+z)(y+37)

1 math question plz help quick

make an input - output table for the function use 0,1,2,3 as the domain Y=21-2x-inputoutput 00 119 217 315-come on... do you just not pay attention in class? x is your domain and = 0, 1, 2, 3 y is y

HELP!! Algebra homework!??

Tim has $315 in five and tend dollar bills, the number of tens is 21 less than 7 times the number of fives.How many five dollar bills does he have?? WHAT ARE THE STEPS?-Write initial equation: 315 = 1

Prove that every odd integer is congruent to 1 modulo 4 or to 3 modulo 4.

So we know that 1 = 1 mod 4 5 = 1 mod 4, 9 = 1 mod 4.. inductively we can see that all numbers 4n+1 = 1 mod 4 we know that 3 = 3 mod 4, 7 = 3 mod 4, 11 = 3 mod 4, etc. and we can see that all numbers

What is an unitless unit in trigonometry

I am not quit sure. please help-Ratio of lenghts-Im sure you mean the dimensionless unit - which is the radian-I think Radians

Limit Problem (L'H)..

lim [(x^6 + 3x^5 + 4)^(1/6) -x] x->infinity The answer is 0.5. Please tell me how to do this. Thanks.-To keep this from getting too painful with conjugate-related tricks... lim(x→∞) [(x^6 + 3x^5 + 4