Alguien me ayuda con estas ecuaciones puras? a) x²-49=0 b) x²-81=0 c) 10x²- 40=0

The triangles in the diagram are congruent. if mzf = 40°, mza = 80°, and mzg = 60°, what is mzb?

Solve the equation for b: a= (1/2)(b)(h)

Amayoral candidate would like to know her residents’ views on a public open space before the mayoral debates. she asks only the people in her office. her co-workers are an example of a census population convenience sample simple random sample