97% of steel is made of iron. If there are 500 lbs of steel, approximately how many pounds are iron?

Solve negative one fifth times the quantity 3 minus 12 times the quantity one third squared end quantity end quantity.

katrin [286]

The solution to the given equation is -87/45

<h3>Product of expressions</h3>

Given the following expression that represents the word problem as;

-1/5 * 3 - 12(1/3)^2

Using the PEMDAS rule, the parenthesis and exponent will come first to have;

-1/5 * 3 - 12(1/3)^2 = -1/5 * 3 - 12(1/9)

Then multiplication

-1/5 * 3 - 12(1/9) =. -3/5 - 12/9

Find the difference

-1/5 * 3 - 12(1/9) = -27-60/45

-1/5 * 3 - 12(1/9) = -87/45

Hence the solution to the given equation is -87/45

Learn more on PEMDAS here; brainly.com/question/345677

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4 0

1 year ago

Classify each of the following as nominal, ordinal, interval, or ratio data.

Marina CMI [18]

Answer:

(a) The ranking of a company in the Fortune 500. Ordinal

(b) The number of tickets sold at a movie theater on any given night. Ratio

(c) The identification number on a questionnaire. Nominal

(d) Per capita income. Ratio

(e) The trade balance in dollars. Ratio

(f) Profit/loss in dollars. Ratio

(g) A company’s tax identification. Nominal

(h) The Standard & Poor’s bond ratings of cities Ordinal

Step-by-step explanation:

Nominal, ordinal, interval, or ratio data are the four fundamental levels of measurement scales that are used to capture data.

Nominal scales are used for labeling variables, without any quantitative value.

Ordinal the order of the values is what is significant, but the differences between each one is not really known.

Interval we know both, the order and the exact differences between the values

Ratio data they have the order, the exact value between units, and have an absolute zero

7 0

2 years ago

Approximately 52% of all recent births were boys. In a simple random sample of 100 recent births, 49 were boys and 51 were girls

Leni [432]

Answer:

Option A is right

Step-by-step explanation:

Given that approximately 52% of all recent births were boys. In a simple random sample of 100 recent births, 49 were boys and 51 were girls. The most likely explanation for the difference between the observed results and the expected results in this case is

A) variability due to sampling

-- True because there is a slight difference whichmay be due to sampling fluctuations.

B) bias

False because given that 100 random births selected

C) nonsampling error

False. There is no chance for systematic error here.

d) Confounding: There is no confounding variable present inchild birth since each is independent of the other

e) a sampling frame that is incomplete

False because the sampling is done correctly.

8 0

2 years ago

Abebe is saving money from work and his Mom will give him an extra

dalvyx [7]

$5.11 becausw djehqutuuwuurywyueuryeywyydyyayeyeyayeyyry

7 0

3 years ago

(1 point)

AlekseyPX

Answer:

20 + 3x ≥ 50

Step-by-step explanation:

After x days, John will have added 3x points to his total. The new total will be ...

20 +3x

We want that value to be at least 50, so we use the symbol "greater than or equal to" to express that relationship:

20 +3x ≥ 50

_____

Brainly makes available a table of math symbols so you can choose the appropriate one to use in your expression. The number 2 is not the same as the symbol ≥. Using incorrect symbols makes it very difficult to tell what the intended problem is.

8 0

2 years ago

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