Solve the equation 12-2(3H)= -18 for H

How many real and imaginary solutions does the equation x^2-3x=-2x-7 have?

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .