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3 years ago

Find how many ways can we find three students out of ten students

Mathematics

1 answer:

Marysya12 [62]3 years ago

7 0

Answer:

Step-by-step explanation:

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Lucy went to Chik Fil A. She bought a meal that cost $9.27. If the tax rate is 6% how

borishaifa [10]

Answer:

$9.83

Step-by-step explanation:

Tax= 6% of 9.27

$=\frac{6}{100}*9.27\\\\=\frac{55.62}{100}\\\\=0.5562$

Amount paid by her = 9.27 + 0.5562 = 9.8262 = $9.83

4 0

3 years ago

Solve 5x2 = −30x − 65. x = −3 ± 2i x = −3 ± 4i x = −6 ± 2i x = −6 ± 4i

Vladimir [108]

The answer is -6 -/+ 4i. Hope this helps.

8 0

3 years ago

Congruent Triangles ?

mel-nik [20]

Check the picture below.

well, it's noteworthy to say that when dropping a perpendicular line from a right angle in a right triangleto the hypotenuse, we'd end up with 3 similar triangles, a Large a Medium and a Small one, all three similar.

3a)

is the Small similar to the Large one? well, let's notice, they both have a 90° angle and also they share the purple one, similar triangles by AA.

3b)

are the Medium and the Large one similar? well, let's notice, just like before, they both have a 90° and they also share the green one, similarity by AA.

3c)

are the Small and Medium similar?

if Large ~ Medium

and

Large ~ Small

then

Medium ~ Small.

4 0

2 years ago

Help someone please

leva [86]

21.19%

First you need to find the z-score with

X- Mean
----------- = Zscore
Standard
Deviation

Then use your z table (should be on your formula sheet if not look one up)
to find your proportion (in this problem it would be .2119) and convert it to a percent.

So plug everything in

6.64-7.2
------------ = Z-Score
.7

Z-Score= 0.8

The table showed our proportion to be .2119

therefore your percent is 21.19%

4 0

3 years ago

Consider the matrix shown below:

velikii [3]

Answer:

$A)\ \ \ \ \left[\begin{array}{ccc}8&-5\\-3&2\\\end{array}\right]$

Step-by-step explanation:

Given the matrix: $\left[\begin{array}{ccc}2&5\\3&8\\\end{array}\right]$ , it's inverse is calculated using the formula:

$\left[\begin{array}{ccc}a&b\\c&d\\\end{array}\right]^{-1}=\frac{1}{det\left[\begin{array}{ccc}a&b\\c&d\\\end{array}\right] }\left[\begin{array}{ccc}d&-b\\-c&a\\\end{array}\right]$

#Therefore, we calculate as;

$\frac{1}{det\left[\begin{array}{ccc}2&5\\3&8\\\end{array}\right] }\left[\begin{array}{ccc}8&-5\\-3&2\\\end{array}\right] \\\\\\\\\#det\left[\begin{array}{ccc}2&5\\3&8\\\end{array}\right] =1\\\\\\\\=\frac{1}{1}\left[\begin{array}{ccc}8&-5\\-3&2\\\end{array}\right] \\\\\\\\=\left[\begin{array}{ccc}8&-5\\-3&2\\\end{array}\right]$

Hence, the inverse of the matrix is $\left[\begin{array}{ccc}8&-5\\-3&2\\\end{array}\right]$

8 0

3 years ago

Find how many ways can we find three students out of ten students​

Find how many ways can we find three students out of ten students