Once your friend has thought of a number, do the following:
1. Ask him or her to multiply the chosen number by 2.
2.Choose an even number to use yourself. Ask your friend to add this number to the one in his head.
3.Tell him/her to divide the new number by 2.
4.Tell your friend to subtract his original number from the equation.
5."Guess" the number.
:)
1) 6x
2) 2x + 4
3) 5y + 11
hope this helps!
Answer:
The temperature of the chemical solution after t hours is 
Step-by-step explanation:
Given that the initial temperature of the chemical solution,
.
The rate of decreasing temperature, 
So, after t hours, the temperature of the chemical solution will decrease by
.
So, the temperature of the chemical solution after t hours,

Hence, the temperature of the chemical solution after t hours is
.
Answer:
Area = 400 Perimeter = 80
Step-by-step explanation:
aree = 400
side = sqrt of 400 = 20
perimeter = 4*20 = 80