# Posts by Genie_math

Total # Posts: 17

Math
19/4 + v = 137/8 v = 137/8 - 19/4 v = 137-38/8 v = 99/8 v = 12 3/8

Math 8 - help!!!!!!!!!!!!!!!
Sorry i made a mistake . Its 8 + 2d = 12 2d = 4 d = 2

Math 8 - help!!!!!!!!!!!!!!!
First multiply the 2 on the left hand side with each item in the brackets. 2*4 - 2*d + 2*2d = 12 8 - 2d + 4d = 12 Now add all the similar terms on left hand side. i.e 2d & 4d 8+4d = 12 now subtract 8 from both sides 8-8+4d = 12-8 4d = 4 d = 1 If I helped you then reply and ...

chemistry
In the physical sciences, an open system (system theory) is a system that matter or energy can flow into and/or out of, in contrast to a closed system, which no energy or matter may enter or leave.

Chemistry
Exothermic reaction - Energy is released - so it is less than zero. [Negative value] Endothermic reaction - Energy is absorbed - greater than zero [Positive value] Examples - Exothermic Reactions C(s) + O2(g) → CO2(g); ΔH = –393.5 kJ H2(g) + 1/2 O2(g) → ...

2.08 = 2 + .08 = two and 8 one-hundredths 4.196 = 4 + 0.1 + 0.09 + 0.006 = four and one hundred ninety-six one-thousandths 53.5 = 50 + 3 + 0.5 = fifty-three and five tenths 0.6047 = 0.6 + 0.004 + 0.0007 = six thousand forty-seven ten-thousandths

science

Math
Total cards - 52 Total spades - 13 Total clubs - 13 The probability of selecting 2 cards - 52C2 Given - Second card is a club The first card to be a spade - 13C1 total probability - [13C1] [13C1] _______________ 52C2

College Math Probability
Let 1 <= k <= p−1, where p is prime. Show that p choose k is a multiple of p. What if p is not prime? I think here when we expand p choose k and then input few prime numbers then we always get a multiple of p . And same with when p is not prime.

Math Coll
Find the coeficient of x^18 y^32 z^25 in (x + y + z)^75? How many monomials appear in the expansion of (x + y + z)^75?

Discrete math
There are eighteen guard posts. How many ways can 25 not indistinguishable (That is, they are distinguishable.)guards be distributed to the guard posts, so that no post is empty? Try - (25 choose 18) ??

Discrete math
How many monomials appear in the expansion of (x + y + z)^75?

Discrete math
I need to find the coefficient of x^18 y^32 in (x+y)^50. I understand that we have to use the binomial theorem. I know how to find the coefficient for example x^18 but here we have "x" as well as "y" which I have no idea about.

Discrete math
I couldnot find the Q i posted that's why ... i replied there with some queries. Thank You for replying

Discrete math
Total ten pair of gloves are there. If I choose five gloves at random then whats the probability that there is at least one matched pair? What is the probability that I pick at least one right glove and one left glove?

Math
Ohk so it will be - 1st glove - 20 2nd glove - 18/19 3rd glove - 17/18 4th glove - 16/17 5th glove - 15/16 Total probability = 1 - the probability of above things right ??

Math
Wouldnt it be from 20 gloves as we have 10 pairs. So for first glove we can pick any. [19 remaining] For second glove we have to select from 18 which are different - 18/19 3rd glove - 16/18 4th glove - 14/17 5th glove - 12/16 ...

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