Posts by Elissa

Total # Posts: 23

What mass of glucose (C6H12O6) must dissolve in 400.0 g of ethanol to make a 1.60 m solution?

Pamela is 12 years older than her brother. Last year, she was thrice as old as her brother. How old is Pamela now?


Which of the following experiences is considered a simulation? A. reading a chapter about dissecting a frog with bright pictures and graphs B. listening to a narrator about dissecting a frog in vivid detail C. using a computer program to dissect a frog*** D. watching a video ...

Linear algebra
Consider for every real number a the linear system of equations: { x +( a + 1 )y + a^2 z = a^3 { ( 1 - a )x +( 1 - 2a )y = a^3 { x +( a + 1 )y + az = a^2 b)Find the values of a for which the system has no solution, infinitely many solutions, and a unique solution

I'm supposed to write about a hero using gods and goddesses for this "Your Hero's Journey Outline" but I can't typically think of what to write about. Any ideas?

Algebraic Expressions
The temp. was 72 degrees F at noon. At midnight, the temp. dropped to 12 degrees F. Write an algebraic expression to find the sum.

calculate the mass of naso4 needed to prepare of 0.5L of 0.15M of solution

social studies
What action taken by Mexican officials changed the trade law?

sosial studies
what's an oasis?

question for all
where are these "200 experts" standing by, ready to help us? I haven't gotten any help on my question, and I need it!!!

thanks so much

where are these "200 experts"???? I thought they were on this site, ready to help us?!?!?!

y=5x-7 and -3x-2y=-12 I have to find the linear system using substitution I have gotten it to -3x-2(5x-7)=-12 Now I am stuck at solving for x PLEASE HELP any way you can Thanks Oh, and please show me how you did it as well :)

-3x-2(5x-7)=-12 I need to solve for x, please help!! and show me how you did it if possible!

or, you could do it simpilar and just do 76-19, and you get 57, x=57

Ms. Sue, you've been helping a lot of people, could you help me with my question?

7th grade-math
I need to find the linear system for the equations 4x+3=y and x=y-2 Any help at all would be great! And please show me how you did it if possible, thanks!

8th grade
okay, i know i can't help you with your problem, but I REALLLLLY need help with mine, could you help? Linear systems, the equations are 4x+3=y and x=y-2 I need the solution, and I'm stuck, PLEASE help me!

7th grade math
no problem, you don't happen to know the answer to my problem though, do you? it's labled 7th grade-math by Elissa on the current questions list

7th grade math
OH, i'm sorry, i switched them around; it is calvin that gets 69, and alan that gets 63 but, here's how i did it i started with a few guesses, but when i guessed alan having 63, i said okay, he has 3 times as much as bonnie, so i need to divide 69 by 3 and got 21, then...

7th grade math
use guess and check, the answer is: alan:69 bonnie: 21 and calvin: 63

I need help, i have to solve the linear solution using substitution, the equations are 4x+3=y and x=y-2 Also, please show me how you did it if possible. Thanks!