Enter the correct answer in the box. By what factor should -1-4i/2+9i be multiplied to find the quotient? Enter any complex numbers in the form a+bi .

Two sides of a triangle mesure 20cm and 30cm. what is the measure of the third side

Rachel is studying the population of a particular bird species in a national park. she observes every 10th bird of that species that she can find in the park. her conclusion is that the birds living in the park who belong to that species generally feed on insects. rachel's sample is . based on the sample she picked, rachel's generalization is . reset next

Tell whether the two rates form a proportion