4/5x + 7 =10 what's the value of x

Divide the following fractions 3/4 ÷ 2/3 1/2 8/9 9/8 2

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

How can you find the magnitude of a vector, v = < x,y > , where the horizontal change is x and the vertical change is y?