7.5 liters of a certain solution contain 37 grams of salt. What is the density of salt in the solution? Round your answer, if necessary, to the nearest tenth.

The density of salt solution is .

Step-by-step explanation:

Given that,

Volume of certain solution, V = 7.5 litres

Mass of salt in solution, m = 37 grams

We know that,

We need to find the density of salt in the solution. The density of salt is given by mass per unit volume. The formula can be written as:

So, the density of salt solution is .

x=-2, y=-3

Step-by-step explanation:

we can rearrange the questions to make it easier

y=3x+3

2y=-3x-12

if you add the two equations, you get

3y=0x-9

so y=-9/3 = -3

plug y into one of the equations

-3=3x+3

-6=3x

x=-2

and then check your work by plugging into the other equation:

2*-3=-3(-2)-12

-6=6-12

-6=-6