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3 years ago

Math test! i need help

Mathematics

2 answers:

Y_Kistochka [10]3 years ago

7 0

Answer:

C. x ≥ 4

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable.

lara [203]3 years ago

3 0

Answer:

[3] x ≥ 4

Step-by-step explanation:

[Give] -7 ≥ 13 - 5x

[Subtract 13] -20 ≥ -5x

[Divide by negative & flip the sign since it is negative] 4 ≤ x

[Flip sides & flip the sign] x ≥ 4

Have a nice day!

I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)

- Heather

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A street light is at the top of a 25 ft pole. A 4 ft tall girl walks along a straight path away from the pole with a speed of 6

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Answer:

Tip of the shadow of the girl is moving with a rate of 7.14 feet per sec.

Step-by-step explanation:

Given : In the figure attached, Length of girl EC = 4 ft

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Answer:

Step-by-step explanation:

Part A

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Standard deviation = √(summation(x - mean)²/n

n = 6

Summation(x - mean)² = (2.2 - 2.48)^2 + (2.4 - 2.48)^2 + (2.5 - 2.48)^2 + (2.5 - 2.48)^2 + (2.6 - 2.48)^2 + (2.7 - 2.48)^2 = 0.1484

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Standard error = s/√n = 0.16/√6 = 0.065

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Confidence interval is written as sample mean ± margin of error

Margin of error = z × s/√n

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p = 0.02

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Step-by-step explanation:

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