A = 2, b = -4, c = 7, and d = -3 Evaluate b3/a + c2

Please help me I am failing

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

Asurvey of 45 teens found that they spent an average of 25.6 hours per week in front of a screen (television, computer, tablet, phone, based on the survey’s sample mean, which value could be the population mean? 2.3 hours 27.4 hours 75.3 hours 41.5 hours

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