Lupe tiene $110 en monedas de $10 y de S5, el número de monedas de $10 excede en 2 a las de S5. Cuantas monedas de cada una tiene Lupe?
tarea

Adecibel is a logarithmic unit that can be used to measure the intensity of a sound. the function y = 10logx gives the intensity of a sound in decibels, where x is the ratio of the intensity of the sound to a reference intensity. the reference intensity is generally set at the threshold of hearing. use the graphing utility to graph the decibel function.a whisper has a sound intensity of 30 decibels. use your graph to you complete the following statement. the sound intensity of a whisper is times the reference intensity.

Geometry - finding area of regular polygons and sectors (check my math, i can’t find the error)

∠a and ∠ b are complementary. if m∠ b = 80°, what is the measure of ∠ a? 10° 80° 90° 100°