Arturo O.

06/16/16

Word problem

yesterday, mary mailed her wedding invitations. today she mailed 72 more invitations than she did yesterday. if mary mailed 200 invitations in all, how many invitations did she mail yesterday?

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Biology Chemistry

06/16/16

How many glucose molecules are included in that 200 mL sample?

You have a freshly prepared 1 M solution of glucose in water. You carefully pour out a 200 mL sample of that solution.

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( Polynomials)

06/16/16

Quadratic relations

Expand and simplify -3(x+2)^2 Factor x^2 -3x-4

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Question In Chemistry

06/16/16

If sodium hyposulphite is sodium thiosulphate or there is a deffrence?

question in chemistry

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Physics Vectors

06/16/16

Deep sea diver vectors problem

A deep sea diver swan 30 m due east then 120 m deep down and finally 40 m due south to reach a wrecked ship. How far is the wrecked ship from the diver's starting point ? (Solve using vectors)

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Math Word Problem

06/16/16

A woman bought 100 Christmas cards. For the ones that sing a song when you open them, she paid 30 cents each. For the rest she paid 5 cents each. If the cards c

Need ASAP! Thanks! Lesson 23

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Physics B

06/16/16

inellastic collisions and velocity

a 5 kg box with a velocity of 10m/s will attach inelastically to a 5 kg box and then both boxes will attach to a 5kg box which has a velocity of 5m/s to the left. what is the end velocity

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Algebra 1

06/15/16

The difference of two numbers is 12. One is 7 times the other.

Write a system of equations and solve. What's the largest number?

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Averages

06/15/16

If I have an average of 66% and that is worth 70% what do I need on the exam worth 30% to have an overall average of 70%

If I have an average of 66% and that is worth 70% what do I need on the exam worth 30% to have an overall average of 70%? And as well what is the calculation so I can use it in the future to... more

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Parallel & Perpendicular Lines

06/15/16

Write one equation of a line that is parallel to and one equation of a line that is perpendicular to the graph of the line 11x-6y=21

Writing an equation of a line

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Algebra

06/15/16

If 2x+5=-25 and -3m-6=48, what is the product of x and m

Need to know the product of x and m please cheers!

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Astronomy

06/15/16

According to Wien's Law, how many times hotter is an object whose blackbody emission spectrum peaks in the blue, at a wave length of 450 nm, than a object whose spectrum peaks in the red, at 700... more

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Math Help!!!

06/15/16

math help math help

1) There is a class with 7 men and 13 women that wants to send a delegation of 3 people to see their teacher. How many ways can they form this delegation if there needs to be 2 women and 1 man in... more

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Probability

06/14/16

Find the probability of correctly answering the first 5 questions on a multiple choice test if random guesses are made and each question has 4 possible answers

No other information

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Chemistry

06/14/16

Please help me to chose the best answer

A) Chemical changes are associated primarily extensive properties. B) Chemical changes are easily reversed by altering the temperature of the system. C) Chemical changes provide the only valid... more

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Logarithms

06/13/16

logarithm expansion

I am doing very well with logs, but I cannot figure out this problem. Can anyone help me??? Expand log7(2x-3)^2 (The log 7 IS NOT log base 7, it is log base 10 of 7).

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Geometry

06/13/16

Point slope form

What is the equation in point slope form for the line parallel to y=5x - 4 that contains P (-6,1)? A. X - 1 =-5(y + 6) B. Y +1 = 5(x + 6) C. Y - 1 = -5(x + 6) D. Y - 1 = 5(x + 6)

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Math Answers Math Problem

06/13/16

what is 11/13 rounded to the nearest hundredth

i need help i don't know how to round fractions and i'm struggling and i hear this is the best site for help so can help me i would really appriciate it

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College Algebra

06/13/16

How long after the ball is thrown will it strike the? ground?

A ball is thrown downward from the top of a 150150?-foot building with an initial velocity of 2828 feet per second. The height of the ball h after t seconds is given by the equation h equals... more

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Geometry

06/13/16

Slope intercept form

write an equation in slope intercept form of the line through points S(-7,-6) and T(10,8) A. Y =-14/17x - 4/17 B. y =-14/17x+ 4/17 C. y =14/17x + 4/17 D. Y=14/17x - 4/17

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Math Help

06/13/16