What are the solutions of the following system?
x^2+y^2=25
2x+y=-5
a. (0, –5) and (–5, 5)
b. (0, –5) and (5, –15)
c. (0, –5) and (–4, 3)
d. (0, –5) and (4, –13)

The size of a certain cell is 2.5*10^-9m. another cell is 1.5*10^3 times larger. how large is the larger cell in scientific notation?

The given dot plot represents the average daily temperatures, in degrees fahrenheit, recorded in a town during the first 15 days of september. if the dot plot is converted to a box plot, the first quartile would be drawn at __ , and the third quartile would be drawn at link to the chart is here

What is the name of a polygon that has four congruent sides and theses angle measures 60,120,60,120?