Conjecture: if 2(x^2 + 5) = 60, then x is 5 or –5.

1: 2(x^2 + 5) = 60
2: 2x^2 + 10 = 60
3: 2x^2 = 50
4: x^2 = 25
5: x = ±5

. will give brainliest

Which is the graph of the piecewise function f(x)? f(x)=[tex]f(x) = \left \{ {{-x+1, x\leq 0 } \atop {x+1, x\ \textgreater \ 0}} \right.[/tex]

For what values of x is x2 + 2x = 24 true?

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%