Plz help me, my test is going to end in 15min, plz help i beg you THANK YOU SO MUCH. Plz answer fast and show working god bless you

5x + 2 = 12 solve the following equation. then place the correct number in the box provided.

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

Which expression is a perfect cube? a. x8 b. y24 c. m28 d. x64