In a paragraph, explain what the domain and range is for the function f(x) = x2 + 4x - 21, why?

Find the length of the following tangent segments to the circles centered at o and o' whose radii are 5 and 3 respectively and the distance between o and o' is 12. what is the tangent segment of cd?

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

Which expression is equivalent to 16 in exponential form? a) 4 × 4 b) 8 × 2 c) 23 d) 24