Answer:
x = 10.73
Step-by-step explanation:


Answer: Option b

Step-by-step explanation:
Linear equations have the following form:

Where the exponents n, m, s and h are always 0 or 1
To know which equations are nonlinear, identify among the options given, those that have exponents other than 1 or 0
Note that in option b) the exponent of the variable x is
therefore the equation is nonlinear
Finally the answer is the option b
-18 + x = -11
Let's add 18 to both sides
x = 7
Equation for density is mass/volume
Mass=22.62 g
Volume= 22/7 x 1/2^2 x 4
3.14 x 0.5 x 0.5 x 4
=3.14 cm3
Mass/ Volume
22.62/3.14
7.2 g/cm3 is the answer