Khan Academy question thanks for whoever answers

What is the approximate value of  x  in the equation below.–3.396–0.7080.3040.955

Isaac wants the equation below to have no solution when the missing number is placed in the box. which number should he place in the box?

Elm street is straight. willard's house is at point h between the school at point s and the mall at point m. if sh = 3 miles and hm = 4.5 miles, what is the value of sm in miles?