Para una fiesta, Susan calculó que asistirían 14 personas, pero solo 12 se presentaron. ¿Cuál fue el porcentaje de error en su estimación?​

7x+8y=-18, 4x-9y=-3 solve the system of equations

The jewelry store is having a sale. necklaces that were regularly priced at $23.50 are on sale for $18.80. what is the percentage of decrease in the price of necklaces?

Abird on top of a 200 ft bridge tower sees a man standing on the lower part of the bridge (which is 50 ft above the ground). the angle of depression from the bird is 26 ̊. how far is the man from the base of the bridge tower? with explanation and pictures .