Answer:
The concentration of hydrogen ions in moles per liter (M) is 
Step-by-step explanation:
As we know
The hydrogen ion concentration of any solution at pH is given by

Substituting the given values in above equation, we get -
mol/l
The concentration of hydrogen ions in moles per liter (M) is 
Answer:
23 i think
Step-by-step explanation:
Answer:
33, 97
Step-by-step explanation:
Start by setting up equations for the equivalent angles
3z + 2 + 79 = 180
3z = 99
z = 33
3z + 2 = y
3(33)+2 = y
97 = y
First thing to do is to move the constant over to the other side of the equals sign. Then we will complete the square on the x terms. We will take half the linear term, square it, then add it to both sides. Our linear term is 4. Half of 4 is 2, and 2 squared is 4.

. In the process of completing the square we have created a perfect square binomial on the left which is

. A is our answer.
Well I believe that the equation would be
Cairo: y=45+24x
Tarantino: y=30x
The answers would be:
B. Tarantino's cost can be modeled by 30h
D. If the work takes 7 hours , Tarantino's is cheaper