Answer: 70
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Explanation:
The y is a placeholder for a number. In this case, we'll replace it with 4.
So [tex]5y^2 - 10[/tex] becomes [tex]5(4)^2-10[/tex]
Use the order of operations PEMDAS to simplify
[tex]5(4)^2-10\\\\5(16)-10\\\\80-10\\\\70\\\\[/tex]
Therefore, [tex]5y^2-10\\\\[/tex] evaluates to 70 when y = 4.
Put another way, the equation [tex]5y^2-10 = 70\\\\[/tex] has one solution that is y = 4.
