# Posts by Ernesto

Total # Posts: 11

**Algebra 2**

Am I correct in these problems? 1. f(x)= 2x + 3 g(x) = 2x^2 + 2x Find f(g(x)) 2(2x^2+2x)+3 =4x(x+1)+3 2. f(x) = 5x + 3 g(x) = 2x^2 -2x + 2 Find (fg(x)) (5x+3)(2x^2-2x+2) 2(5x+3)(x2-x+1)

**Math**

Carlene saves $y. Sharon save 3 times as much money as Carlene. Jason saves $50 more than Sharon. How much do they have altogether?

**college chemistry 4**

you and a friend have two flasks, one containing hydrogen gas and the other chlorine gas; you each take one flask and go to opposite sides of the room, 10.0m apart. if you were both to popen your flasks toward each other at the same time, where in the room would the explosive ...

**College Chemistry 3**

Find the empirical Formula of a compound that is 30.4% nitrogen by mass, and consists of only nitrogen and oxygen. What is its molecular formula if its molar mass is 92g/mol?

**college chemistry 2**

if 20g of CaSiO3 is mixed with 15g of HF which of the two is the limiting reactant and how many grams of the other will be left

**College Chemistry**

what is the percent yield of SiF4 using the mixture in the previous question if 8.76g of SiF4 is obtained from the reaction

**math**

how you would use front-end estimation to subtract 189 from 643 explain

**Physics #2**

4.7m/s

**Chemistry**

I need to find the mass of solute that will dissolve in 300 g water at 45 degrees C.

**Math**

(x-7)(x-1/2)

**chemistry**

what is the percent yield of SiF4 using the mixture in the previous question if 8.76g of SiF4 is obtained from the reaction