Josie calculated 1/5 + 1/2 and said the answer was 2/7 explain how do you know that josie answer does not make sense

Empty box + box + empty box fill in the box is equal to 30 how

What is the value of x in the following equation? -3x-2=2x+8

The table shows the results of three plays in a football game. what is the net result of the three plays? football game 1st play 5 yards 2nd play -9 yards 3rd play 12 yards