What do you mean by half life
Answer. 1985
Step-by-step explanation:
You add 184 and 213 and then get 387 then × it by 5 and get 1985
What is the value of x in the equation 3x-4y=65 when y=4?
Simple...plug n chug..
3x-4(4)=65
3x-16=65
Now, isolate the variable, x....
3x-16=65
+16 +16
3x=81
Now, divide,

x=27.
Thus, your answer.
One variable is the amount of days. Lets call the amount of days D. Another variable is the amount of pictures left. Lets call this p. In this case, since Emanuel is deleting 20 pictures a day, and he has 745 picture to start with, the equation would be 745- 20D=p.