Answer:
b) -6
Step-by-step explanation:
[tex]2\sqrt{10+n} = 4[/tex]
Divide both sides by 2
[tex]\sqrt{10+n} = 2[/tex]
Square both sides of the equation
[tex]10+n=4[/tex]
Isolate the variable
[tex]n = 4 - 10[/tex]
[tex]4 -10 = - 6[/tex]
[tex]n = - 6[/tex]
