4x² - 49y² = (2x)² - (7y)² = (2x - 7)(2x + 7)
Answer:
The new volume is 20litres
Step-by-step explanation:
This problem bothers on the expansion of gases
According to Boyle's law
The volume of a given mass of gas at constant temperature is inversely proportional to the pressure
P∝1/v
Pv= constant
Given data
P1= 1.5atm
v1 = 10 litter
P2=0.75atm
v2=?
Applying P1v1= P2v2
v2= P1v1/P2
v2= 1.5*10/0.75
v2= 15/0.75
v2= 20litres
Answer:
The missing value is 2
Step-by-step explanation:
A direct variation satisfies the equation
.
Since the point (-18, 12) lies on this line, it must satisfy this equation.


Hence the equation of this line is 
Now we substitute x=-3 to find y.

Therefore the missing value is 2
Answer:
0.752
Step-by-step explanation: