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2 years ago

The mean score was 72. The standard deviation was 7 percentage-points. Based on this information, what is the best

Mathematics

1 answer:

fiasKO [112]2 years ago

5 0

Answer:

the number of student that took the test is missing

I think it is 100?

79 is 1 sigms (1 standard deviation) above the mean....

1 sd is 84% ... 16% are above the 79

multiply the students that took the test by .16

Step-by-step explanation:

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Eight hundred thirty-three billion, four hundred thousand,<br> nine hundred six

kompoz [17]

Answer:

What's the question?

Step-by-step explanation:

I will help if I knew the question

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2 years ago

Use the quadratic formula to find the solutions to the quadratic equation below x^2-6x-5=0

Sonja [21]

Answer:

$\large\boxed{x=3-\sqrt{14}\ \vee\ x=3+\sqrt{14}}$

Step-by-step explanation:

$x^2-6x-5=0\qquad\text{add 5 to both sides}\\\\x^2-6x=5\\\\x^2-2(x)(3)=5\qquad\text{add}\ 3^2\ \text{to both sides}\\\\x^2-2(x)(3)+3^2=5+3^2\qquad\text{use}\ (a-b)^2=a^2-2ab+b^2\\\\(x-3)^2=5+9\\\\(x-3)^2=14\to x-3=\pm\sqrt{14}\qquad\text{add 3 to both sides}\\\\x=3-\sqrt{14}\ \vee\ x=3+\sqrt{14}$

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2 years ago

Help me please! I need to find the answer for the angle indicated in bold!

bagirrra123 [75]

$(x+ 63) + (x + 133) = 180 \\ 2x + 196 = 180 \\ 2x = - 16 \\ x = - 8 \\ so... \\ x + 133 = ( - 8 ) + 133 \\ = 125$

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2 years ago

Find the height of a square pyramid with volume 37.3 ft3 and dimensions of base 4 ft by 4 ft. Please help!

Ket [755]

$\bf \textit{volume of a square pyramid}\\\\ V=\cfrac{1}{3}Bh~~ \begin{cases} B=area~of\\ \qquad its~base\\ h=height\\ \cline{1-1} B=\stackrel{4\times 4}{16}\\ V=37.3 \end{cases}\implies 37.3=\cfrac{1}{3}(16)h\implies 111.9=16h \\\\\\ \cfrac{111.9}{16}=h\implies 6.99375=h$

6 0

2 years ago

Read 2 more answers

What is 2/5 divided 3/4

Zepler [3.9K]

Answer:

8/15

Step-by-step explanation:

To divide by a fraction, change the division to a multiplication, and flip the fraction.

2/5 / 3/4 = 2/5 * 4/3 = 8/15

4 0

3 years ago