QUESTÃO 18 Observe as igualdades:
1) 6 - (-1) = + 7
II) - 30 - (-1) = - 31
III) 40 - 50 = -(40 - 50)
IV)-7-(-7) = 0
Quantas delas são verdadeiras?
a) 0
b) 1
c) 2
d) 3
e) 4​

An assembly consists of two mechanical components. suppose that the probabilities that the first and second components meet specifications are 0.87 and 0.84. assume that the components are independent. determine the probability mass function of the number of components in the assembly that meet specifications. x

Need ! the total ticket sales for a high school basketball game were $2,260. the ticket price for students were $2.25 less than the adult ticket price. the number of adult tickets sold was 230, and the number of student tickets sold was 180. what was the price of an adult ticket?

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