If ∠c and ∠d are vertical angles and m∠c=x and m∠d=−3x+80, what is m∠c?

i'm super lost, can someone ?

Renita analyzed two dot plots showing the snowfall during the winter months for city a and for city b. she found that the median snowfall is 5 inches less in city a than in city b. the mean snowfall is about 2 inches less in city a than in city b. which explains why there is a difference in the measures of center for the sets of data?

We have enough material to build a fence around a station that has a perimeter of 180 feet the width of the rectangular space must be 3 1/4 feet what must the length be

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?