Answer:
12. x = [tex]\sqrt{7}[/tex]
15. x = [tex]\sqrt{330}[/tex]
Step-by-step explanation:
12. 7[tex]x^{2}[/tex] = 49
[tex]\frac{7x^2}{7}[/tex]= [tex]\frac{49}{7}[/tex]
[tex]x^{2}[/tex] = 7
[tex]\sqrt{x^2}[/tex] = [tex]\sqrt{7}[/tex]
x = [tex]\sqrt{7}[/tex]
15. [tex]\frac{x^2}{3\\}[/tex]=110
3* [tex]\frac{x^2}{3}[/tex] = 110*3
[tex]x^{2}[/tex] = 330
[tex]\sqrt{x^2}[/tex] = [tex]\sqrt{330}[/tex]
x = [tex]\sqrt{330}[/tex]
