# Posts by Elissa

Total # Posts: 23

**Chemistry**

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

**Math**

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

**Science**

Hydhsy

**Computers**

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

**English**

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.

**chemistry**

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!!!

**math**

thanks so much

**math**

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

**math**

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 :)

**math**

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

**Math**

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

**history**

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

**algebra**

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!