Wich number is the principal square root of 49

1 answer:

3 0

A principle square root of a real number that's not negative, such as 49, is the square root of that number that is not negative.

If you take the square root of 49, you get either -7 or 7, since both $7^{2}$ and $(-7)^{2}$ equal 49. However, the principle square root would be A) 7, since it's not negative.

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50+25 POINTS!!! PLZ HELP WILL GIVE BRAINLIEST!!!

frosja888 [35]

3x-2 if x is less an or greater than 1, will be a negative y value.

-2x+3 when x is greater than 1 will also be a negative y value.

The graph would be the first one ( an upside down V)

5 0

3 years ago

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Question 3:

goldenfox [79]

Answer:

Step-by-step explanation:

x^2 + 7x+ 10. factors out to (x - 2)(x + 5)

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3 years ago

A soft-drink machine can be regulated so that it discharges an average of μ oz. per cup. If the ounces of fill are Normally dist

sattari [20]

Answer:

μ = 5.068 oz

Step-by-step explanation:

Normal distribution formula to use the table attached

Z = (x - μ)/σ

where μ is mean, σ is standard deviation, Z is on x-axis and x is a desired point.

98% of 6-oz. cups will not overflow means that the area below the curve is equal to 0.49; note that the curve is symmetrical respect zero, so, 98% of the cases relied between the interval (μ - some value) and (μ + some value)].

From table attached, area = 0.49 when Z = 2.33. From data, σ = 0.4 oz and x = 6 oz (maximum capacity of the cup). Isolating x from the formula gives

Z = (x - μ)/σ

2.33 = (6 - μ)/0.4

μ = 6 - 2.33*0.4

μ = 5.068

This means that with a mean of 5 oz and a standard deviation of 0.4 oz, the machine will discharge a maximum of 6 oz in the 98% of the cases.