If yy varies jointly with xx and zz, what is the constant of proportionality when y=30y=30, x=4x=4, and z=5z=5?

Find the cosine function that is represented in the graph.

12 out of 30 people chose their favourite colour as blue caculate the angle you would use for blue on a pie chart

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