Calcula a través de sustitución, igualación, reducción y graficas las siguiente ecuación. 3x + 2y =7 5x + 3y =11
4x - 3y =-2 3x + y = 5

*Este problema se resuelve de una sola forma o método.

El cajero de un banco entrega a un cliente 40 monedas de $50 centavos y de un peso, si lo que entregó importa $32 pesos, ¿Cuántas monedas hay de cada denominación? R=

(SI NO SABES LA RESPUESTA NO CONTESTES O TE REPORTO.)

Atest of sobriety involves measuring the subject's motor skills. a sample of 31 randomly selected sober subjects take the test and produce a mean score of 64.4 with a standard deviation of 2. a claim is made that the true mean score for all sober subjects is equal to 65. for each part below, enter only a numeric value in the answer box. for example, do not type "z =" or "t =" before your answers. round each of your answers to 3 places after the decimal point. (a) calculate the value of the test statistic used in this test. test statistic's value = (b) use your calculator to find the p-value of this test. p-value = (c) use your calculator to find the critical value(s) used to test this claim at the 0.2 significance level. if there are two critical values, then list them both with a comma between them. critical value(s) =