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4 years ago

Find the value of x.

Mathematics

1 answer:

wlad13 [49]4 years ago

3 0

Answer: The letter x is often used in algebra to mean a value that is not yet known. it is called a variable or somethings an unknown in x + 2 = 7, x is a variable but we can work out its value if you try a variable does not have to be x though it could be y or w, or any letter, name or symbol. See: variable

Step-by-step explanation: and that's it! have a yummy cookie day! ◑﹏◐

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What is the value of this expression? 3 × (7 – 2) + 4 A. 12 B. 19 C. 23 D. 27 HELP!

Vika [28.1K]

Follow the order of operation: PEMDAS

Parenthesis
Exponents (and roots)
Multiply
Divide
Add
Subtract

3 x (7-2) + 4

first do Parenthesis (as it shows up first)

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Next, Multiply (the next one you have to do)

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3 years ago

A company is interested in evaluating its current inspection procedure on large shipments of identical items. The procedure is t

olchik [2.2K]

Answer:

0.91854

Step-by-step explanation:

Given that a company is interested in evaluating its current inspection procedure on large shipments of identical items.

The procedure is to take a sample of 5 items and pass the shipment if no more than 1 item is found to be defective.

It is known that items are defective at a 10% rate overall.

If X is the number of defectives in the sample of 5, we find that X has two outcomes and each trial is independent of the other

So X is binomial with n =5, and p = 0.10

the probability that the inspection procedure will pass the shipment

= $P(X\leq 1)\\ \\= (0.9)^5 + 5 (0.1)(0.9)^4\\= (0.9^4) (0.9+0.5)\\= 0.91854$

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