If x2 = 10, what is the value of x?

±square root of 10
±square root of 20
±5
±20

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The graph of a function f(x)=(x+2)(x-4). which describes all of the values for which the graph is negative and increasing? all real values of x where x< -2 all real values of x where -2

Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.