Fie ABCDEF o prismă triunghiulară regulată, cu AB = 18 cm și AD = 9 cm. Calculați măsura unghiului format de planele (DBC) și (ABC). Repede!!
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The graph of a hyperbola is shown. what are the coordinates of a vertex of the hyperbola? (0, −4) (−3, 0) (0, 0) (0, 5)

Grace is a 70-year old woman who paid the utility bill online for the first time. she called her bank's customer service center to make sure she had done the transaction successfully. but the voice recording repeatedly played a message that all representatives were busy, which irked grace. which factor would make grace not recommend the bank to others? a. absence of technology b. lack of accessibility c. lack of financial products d. poor reputation

How do i create an equivalent expression that includes parentheses so that the value of the expression is 2 for 3+8-4x2-12