What is the solution set for 13^x=61

What is the explicit formula for this sequence? -7, -4, -1, 2, a.) an = 8 + (b - 1)3 b.) an = -7 + (n - 1)3 c.) an = 3 + (n -1) (-7) d.) an = -7 + (n - )

Bring the fraction a/a-4 to a denominator of 16-a^2

Which of the following is another way to express the difference between -5 and 8?