The answer is A :The graph has closed circles on the left of the step and open circles on the right and includes the step
So basically you do this ....
Hope it helps
Answer:
1/9 para un bocadillo y 1/13 para un montadito.
Step-by-step explanation:
Bocadillo:
9/9 es el pan entero (porque dividiendo 9 entre 9, te da 1, es decir, la unidad). Para hacer un bocadillo tienes que sacar uno de los trozos, que sería 1/9.
Con los montaditos es igual solo que en vez de dividir el pan en 9 trozos, lo divides en 13.
A. True. Summing any rational number with an irrational number leads to an irrational result. The proof is a bit lengthy so I'm leaving it out.
B. True. Adding p/q with r/s leads to (ps+qr)/(qs) which is rational. Keep in mind that q and s cannot be zero.
C. False. One counter example is sqrt(3)*sqrt(12) = sqrt(3*12) = sqrt(36) = 6. This shows the product of two irrational numbers, in this case sqrt(3) and sqrt(12), multiplying to get a rational result 6 = 6/1.
D. True. Multiplying p/q and r/s leads to (p*r)/(q*s) which is rational. Keep in mind that q and s cannot be zero.
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The final answer is choice C
