Solve x to the power of 2 = 4 where x is a real number. Please help fast

Find all the values of x that make 0.1x + 0.25(102 - x) < 17.10 true.

On new year's day, the average temperature of a city is 5.7 degrees celsius. but for new year's day 2012, the temperature was 9.8 degrees below the average. i) if a represents the average temperature on new year's day and 7 represents the temperature on new year's day 2012, what formula accurately relates the two values together? ii) what was the temperature on new year's day 2012? dt a 0.8 ii) - 4 1 degrees celsius da-t-98 ii) 59 degrees celsius 1) 7 = -9,8 11) 59 degrees celsius ii) l degrees celsius

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*