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Semenov [28]
4 years ago
11

0" id="TexFormula1" title=" \frac{\sqrt{x} }{y} -\frac{y}{x} ; x=25, y=-7 " alt=" \frac{\sqrt{x} }{y} -\frac{y}{x} ; x=25, y=-7 " align="absmiddle" class="latex-formula">
Mathematics
1 answer:
zavuch27 [327]4 years ago
7 0

\frac{\sqrt{25}}{-7}-\frac{-7}{25}

\frac{5}{-7}+\frac{7}{25}

\frac{5.25-7.7}{-7.25}

\frac{125-49}{-175}

-\frac{76}{175}

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Area of composite shapes!!
Bingel [31]

Answer:

34.5 units²

Step-by-step explanation:

7 x 3 = 21

4.5 x 3 = 13.5

21 = 13.5 = 34.5 units²

4 0
3 years ago
If the perimeter of a rectangle is 78 inches and the length is 13 inches more than its​ width, find the area of the rectangle.
Feliz [49]
I believe the area of the rectangle would be 338
8 0
3 years ago
Printed circuit cards are placed in a functional test after being populated with semiconductor chips. A lot contains 140 cards,
Ray Of Light [21]

Answer:

The probability that at least 1 defective card is in the sample is 0.9644

Step-by-step explanation:

Here

N = 140

and n = 20

We will use the below given formula

P(at least 1 defective) = 1 - P( 0 defectives)

P( 0 defectives) =

= \frac{^{20}C_0 * ^{120}C_{20}}{ ^{140}C_{20}}\\= 0.0356 1-0.0356 \\= 0.9644

5 0
3 years ago
The researcher originally reported a standard deviation of 12.3 grams. However, upon closer investigation, she discovered that h
timofeeve [1]

Answer:

12.3 grams

Step-by-step explanation:

When a constant value is added to each data element in a distribution, the maen changes by that constant but the standard deviation stays the same. This is because the standard deviation is a measure of how distant the data are from the mean. When a constant value is added to each of them, the mean also gets the increment. Hence, the distance from the mean is maintained.

However, if the data were multiplied by a constant factor, then the standard deviation will be multiplied by the same factor as well as the mean.

Therefore, the standard deviation from the question remains the same as before, 12.3 grams.

4 0
4 years ago
Two triangles can be formed with the given information. Use the Law of Sines to solve the triangles.
spin [16.1K]

Answer:

A = 98°, C = 42°, a = 38.5; A = 2°, C = 138°, a = 1.4

Step-by-step explanation:

Use the law of sine

a/sinA=b/sinB=c/sinC

7 0
4 years ago
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