1/x + 1/y = 7/2
1/x+2/y=5
What does x & y equal?

Aresearch company wants to test the claim that a new multivitamin to improve short term memory. state the objective of the experiment, suggest a population, determine the experimental and control groups, and describe a sample procedure.

Can someone check my answer? you : )

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2