Find the answer for x and for y y=4x-3 8x+2y=-6

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

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.

Given abc find the values of x and y. in your final answer, include all of your calculations.