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Arisa [49]
2 years ago
8

5x-4[7+(2x-4)], for x=-3 with shown work please

Mathematics
2 answers:
wel2 years ago
5 0

Answer: -3

Concept:

Here, we need to understand the idea of evaluation.  

When encountering questions that gave you an expression with variables, then stated: "If x = a, y = b, z = c" (a, b, c are all constants), this means you should substitute the value given for each variable back to the expression.

Solve:

<u>Given information</u>

x= -3

<u>Given expression</u>

5x - 4 [7 + (2x - 4)]

<u>Substitute x value into the expression</u>

=5(-3) - 4 [7 + (2(-3) - 4)]

<u>Simplify by multiplication</u>

=-15 - 4 [7 + (-6 - 4)]

<u>Simplify value in parentheses</u>

=-15 - 4 [7 + (-10)]

<u>Simplify value in bracket</u>

=-15 - 4 [-3]

<u>Simplify by multiplication</u>

=-15 - (-12)

=-15 + 12

=\boxed{-3}

Hope this helps!! :)

Please let me know if you have any questions

katovenus [111]2 years ago
5 0
5×(-3)-4{7+[2×(-3)-4]}
-15-4[7+(-6-4)]
=-15-4[7+(-10)]
=-15-4(7-10)
=-15-4×(-3)
=-15+12
=-3

Hope my answer helped u :)
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Answer:

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Step-by-step explanation:

<em>The question is incomplete:</em>

<em>"The port of South Louisiana, located along miles of the Mississippi River between New Orleans and Baton Rouge, is the largest bulk cargo port in the world. The U.S. Army Corps of Engineers reports that the port handles a mean of 4.5 million tons of cargo per week. Assume that the number of tons of cargo handled per week is normally distributed with a standard deviation of 0.82 million tons.</em>

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We can solve this using the z-score.

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Then, the probability that X<5 is:

P(X        

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