If 4^x+1 = 64, then what is the value of x^4

What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9

Asequence is defined recursively using the formula f(n + 1) =f(n) - 5. which sequence could be

The perimeter of an equilateral triangle is 4 cm more than the perimeter of a square and the length of a side of the triangle is 8 cm more than the length of a side of the aware. find the length of a side of the equilateral triangle