If the mean of the four numbers 4, 8, 2x and
12 is 10, then x is

The table shows the distance traveled over time while traveling at a constant speed.

Use the frequency distribution, which shows the number of american voters (in millions) according to age, to find the probability that a voter chosen at random is in the 18 to 20 years old age range. ages frequency 18 to 20 5.9 21 to 24 7.7 25 to 34 20.4 35 to 44 25.1 45 to 64 54.4 65 and over 27.7 the probability that a voter chosen at random is in the 18 to 20 years old age range is nothing. (round to three decimal places as needed.)

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much