Sabemos que desde una distancia de 10 metros observamos la punta De la Torre de un campanario con un ángulo de 40° ¿que altura tiene la torre?

One-third of the people from country a claim that they are from country b, and the rest admit they are from country a. one-fourth of the people from country claim that they are from country a, and the rest admit they are from country b. in a combined census of the two countries, one-half of the total claimed to be from a. what is the ratio of the populations of country a to that of country b.

If a is a nonzero real number then the reciprocal of a is

Identify the expression equivalent to 4(x + x + 7) − 2x + 8 − 4 by substituting x = 1 and x = 2.