What is the difference between permutations and combinations?

1 tenth of £1.00

1/4 of km =?m

£20 is shared out between bob and katheryn in the ratio 1:3. what fraction of the £20 does bob get?

3 monkeys ate a total of 25 nuts. Each one ate a different odd number of nuts. How many nuts did each monkey eat?

Carlos is ten years older than Jose. Five years ago Carlos was three times as old as Jose. How old is Jose now? here's what i have so far: jose=j carlos=10+j

five years ago carlos would be: (10+j)-5? i'm not sure if i'm doing this correctly. please help.

amul and kim have £10.70 between them. amul has £3.70 more than kim. how much does each have

working out!

An empty carton weighs 750 grams. Packet of crisps weigh 27 grams each. calculate the total weight (in grams) of a carton filled with 24 packets of crisps

3/12 =4 so divide 3788 by answer im guessing

x1/2(3x+x^-2)

A veterinarian needs 60 pounds of dog food that is 15% protein. He will combine a beef mix that is 18% protein with a bacon mix that is 9% protein. How many pounds of each does he need to make the 15% protein mix. Define your variables and write a system of equations to solve.

I have seen questions before in GCSE papers that talk about expressing an answer to an appropriate degree of accuracy. What does that mean and how do I get the right answer?

Assume that it costs Microsoft approximately C(x) = 57,600 + 550x + 0.01x2 dollars to manufacture x Xbox 360s in a day.How many Xboxes should be manufactured in order to minimize average cost? What is the resulting average cost of an xbox?

hello, i was wondering if anyone could answer this question and explain, i will be happy if you do so.

'Work out each of these, giving your answers to the nearest penny.' a) £950÷24 b) £551÷12

Remove the brackets and simplify (x-4) (x-7)

In a system the probability that each individual component of type A will fail is 0.05, type B is 0.04 and type C is 0.01. Components A, B and C are independent. a. Calculate the overall probability that each system will work b. Is there any difference in the probability of these systems, why?

i am in year 9 , ks3

Changing the subject - aaargh! Anyone be able to help?xx

So i found a question which i think looks and is tricky: 1/x = 1/a + 1/b Find x as the subject..Lead me through it please

what is 90% as a fraction

140* (100+30/100) if the cost price is 140 and 30 percent up how do you find selling price,and where did the 100s come in lol

In geometry, what is the longest side of a right-angled triangle, the side opposite the right angle ?

How do we represent the above facts in 1)axiom form and 2)clausal form

1) All babies are innocent 2) Anyone who is innocent and affectionate will be loved by others 3) Anyone who is loved by others, will receive gifts 4) Teena is an affectionate baby

My thoughts on the question : (Let Vx and Ex denote universal and existential quantifiers respectively )

Let B(x) denote x is a baby I(x) denote x is innocent A(x) denote x is affectionate L(x) denote x is loved by others G(x) denote x receives a gift

Axiom Form : 1) Vx[ B(x) --> I(x) ] 2) Vx[ I(x) ^ A(x) ] --> L(x) 3) Vx [ L(x) --> G(x) ] 4) B(Teena) --> A(Teena)

Have I done the first part correctly? And how do we do the second part?

Thanks!

give a condition on n that is sufficient but not necessary for n/3 belonging to Z.

give a condition on n that is necessary but not sufficient for n/3 belonging to Z

Let n belong Z with n > 1. Consider the statement R: 2n

i need help with a math problem

Using the exact values for the sine and cosine of both 3π/4 and π/3, and the angle difference identity for cosine, find the exact value of cos(5π/12).

I have math problem that I have fully solved but got stuck on two questions at the end. It asks me what is the sales person monthly commission if the commission is 15% and his monthly sales is 11,250.00. Next it asks what is the expense allowance if monthly sales is 1500.00 otherwise the expense allowance is 1500.00. Next it states if the team member monthly sales exceed 1,250.00. Do he receive a bonus? Yes Next it asks if total monthly sales is 86,250.00 (added monthly sales, commission,allowance,and bonus to get this amount)by the total monthly sales) Next it asks what is the total monthly compensation? ( I do not know how to find the compensation) Is is the total of all the numbers. This is where I am lost at the percentage and compensation.

x2+6x+8

finding when two town will have equal population

for what values of c will the equation x^2 + c= 0 have two distinct real roots

Stuck on this question - 200g of meat costs 80p. Find the cost of 1 and a half kgs.

3sin(2x+3)

10 x 23.76

how do you find the lcm?

4 men 8hrs to build a wall, how long would it take 7 men to build same wall?

How long does it take an investment to double if interest is computed as compound interest if the rate is 2%

how many pieces of ribbon each 4.5 cm can be cut from a length of 4 and a ahalf metres

my question is find the points of intersection of the straight lines with equations x + 2y = -5 and 3x - y = 13 ? but i have no idea how to do it please help i am revising for my maths standard grade exam !!

Book: Mathematics focus on understanding 9 page 16 part B

1. Draw a right triangle with legs 1 unit in length as shown. Label the right angles. (I did that)

2. Determine the length of the hypotenuse in radical form. Add this number to your diagram. ( what does that mean?)

3. Draw a second right triangle such that the hypotenuse of the first triangle is a leg of the new triangle. The length of the other leg is 1 unit. Determine the length of the hypotenuse of the new triangle in radical form and add this value to your diagram. ( can someone please explain that in less complicated words? Plz!)

MY homw work says'how meny ways can you get 36 by using only 6 digets

i need 4 ways to make 20 only using,5 digets

i have a cylinder that is 2 feet in diameter and 30 feet in length, if it costs $3.50 per square foot how do i figure out what the approximate total cost is for making this pipe which is open at both ends.

hi,

if its 3:21pm what time will it be in 100mins?

Given: PQRS is a rhombus B is midpoint of segment QC D is midpoint of segment SC Prove: Triangle BAD is an isosceles triangle

Basically on graph paper 1 big square or 10 little ones = 0.25 then how many would I need for 0.05? and how did you work it out

A LEVEL-Arithmetic Series

If I pour 1650 ml and 1200 ml of juice into a 2.8 litre jug how much juice is left over

kenken puzzle

Given an array A of numbers of length n (indexed starting at 0), verify that the following pseu-docode program returns the index of the smallest element in the array. What is the LOOP invariant Hint: You should have more than one component to your loop invariant, and both minVal and minLoc should appear somewhere in the invariants. def findMin(A): n = length(A) minVal = A[0] minLoc = 0 for (i = 1, i

Worldwide, wind energy generating capacity, W, was 40,300 megawatts in 2003, and 121,188 megawatts in 2008. a) Use the values given to write W as an exponential function of t

story

2 3/4 - 1/2

1. -2 1/4
2. 1 1/4
3. 2 1/4
4. 3

I have homework to do math reflections. The question is What proceder(s) will find the sum a+b of two numbers where a and b represent any integer? I do not get it and i need help pronto!!!

i need help with math and i am working on arc lengths, central angles, and arc measures

A ship travelled 100 miles in 5 and a half hours. The ship travelled at a constant speed for the first 30 miles before increasing its speed by 5mph during the remainder of the journey. calculate the speed during the first 30 miles.

if a2+(1/a2)=5 and a3+(1/a3)=8 then a5+ (1/a5) =?

1) Using capital letters, show which letters of the alphabet have reflectional symmetry-or both.

2) In the pizza, why do you have to rotate it by 60 degrees for the same view?

on a treasure hunt, players are instructed to go 2km north, then 5km east, then 4km south, then 3km west, and finally 2km north. Where is the treasure relative to the starting point? (( The answer is 2km east of the starting point )) but I dont understand why or how to get that?

what is 4t =1=19

what is 1/5 of 20 and 30