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2 years ago

7

In your own words, explain HOW to find the standard deviation of this data set. (20 points). What does the standard deviation te

ll you about this data? (20 points). Dr. Cwetna recorded all of the grades on a unit test on the chart below. plz somebody help I need this by today.

1 answer:

ipn [44]2 years ago

6 0

I need the choices please

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9+12+21+27=69

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3 years ago

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3 years ago

Need urgent help in mathematics!! Will mark brainliest!!!! PLEASE look at the photo to answer the question .....

Mrrafil [7]

3.1

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3 years ago

3k^2=11+6k : complete the square

WARRIOR [948]

Answer:

3(k - 1)² = 12

Step-by-step explanation:

To complete the square, write the equation standard form and make the a term's coefficient 1.

3k² = 11 + 6k

3k² - 6k - 11 = 0

3(k² - 2k) = 11

Take the middle term -2k and divide the coefficient in 2 and square it. Here it is -2/2 = -1. -1² = 1. Add 1 to both sides.

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2 years ago

Find the product: <br><br>(i) (5 – 2x) (3 + x)

Ilya [14]

<h2><u>Solution</u>:</h2>

$\:$

$\large\red{ \longrightarrow} \pmb{ \sf{(5 – 2x) (3 + x)}}$

$\:$

$\mapsto \: \: \: \sf{5(3 + x) – 2x(3 + x)}$

$\:$

$\mapsto \: \: \: \sf{(5 × 3) + (5 × x) – (2x × 3) – (2x × x)}$

$\:$

$\leadsto \: \: \: \sf{ 15 + 5x – 6x – 2x ^{2} }$

$\:$

hope it helps!! :)

7 0

2 years ago

Read 2 more answers