Un contratista tiene 30 obreros a su cargo, distribuidos en 3 categorıas: A, B y C. El numero de empleados de la categoria B es el doble que el de la categoria A y el de la categorıa

C juntos. A los de la categorıa A se les paga 16000 al dıa; a los de la categoria B se les

paga 20000 al dia; y a los de la categoria C se les paga 24800 al dıa. La n´omina diaria del

contratista es de 586400. ¿Cuantos cobros tiene en cada categorıa?
por método Gauss jordan​

What is the expression in factored form? -x^2 + 3x + 28 a. (x-7)(x-4) b. -(x-7)(x+4) c. (x+4)(x+7) d. -(x-4)(x+7)

The ratios of boys to girls on a soccer league is 2: 5. if there are 28 boys, how many girls are playing soccer? extra points! will mark as brainiest asap

Design an er diagram for keeping track of information about votes taken in the u. s. house of representatives during the current two-year congressional session. the database needs to keep track of each u. s. state's name (e. g., texas', new york', california') and include the region of the state (whose domain is {northeast', midwest', southeast', southwest', west'}). each congress person in the house of representatives is described by his or her name, plus the district represented, the start date when the congressperson was first elected, and the political party to which he or she belongs (whose domain is {republican', democrat', 'independent', other'}). the database keeps track of each bill (i. e., proposed law), including the bill name, the date of vote on the bill, whether the bill passed or failed (whose domain is {yes', no'}), and the sponsor (the congressperson(s) who sponsored - that is, proposed - the bill). the database also keeps track of how each congressperson voted on each bill (domain of vote attribute is {yes', no', abstain', absent'}). additional information: