Решить матричное уравнение a*x-5b=c, если a=(10 3 -3 -2) b=(-1 3 -3 2) c=(7 6 -2 -1

Use the radius you found in part i (r=26.8 cm) with the surface area formula below to find the surface area of the sphere. show your work and round your answer to the nearest tenth. the surface area of a sphere: sa = 4πr^2 self note: 3.8.4

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

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?