Answer: 
Step-by-step explanation:
Let be "x" the original volume of the solution (in milliliters) before the acid was added and "y" the volume of the solution (in milliliters) after the addition of the acid.
Set up a system of equations:
Applying the Substitution Method, you can substitute the second equation into the first equation and then solve for "x":
Answer:
16
Step-by-step explanation:
an hour is 60 minutes, 60 (an hour) divided by 15 (Everytime it takes a picture) is 4. 10 pm to 2 am is 4 hours, 4 times 4 is 16, 16 pictures.
The first onee
because you have to multiply the 3 by x &’ 5
<span>The correct result to the question would be mean.
The mean (average) is found by calculating the sum of all data in the set divided by the number of data values in the set.
The median is the middle value in the list of data values.
The mode is the value which occurs most often.
</span><span>The interquartile range is the difference between the third and the first quartiles.</span>
Answer:
Step-by-step explanation:
ok so first u have to multiply 9x5 which is 45 and put it under the 5
then u multiply 3x5 which is 15 and u put it under the 5 next to the 3
u do the samething over and over, is just basically time tables
