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arsen [322]
3 years ago
12

Find the missing angle.

Mathematics
1 answer:
tatyana61 [14]3 years ago
6 0

Answer:

65

Step-by-step explanation:

75+100+110++65=360

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Jaiden ran a 100 yard dash three times and took the average of his times. His times were 12.7, 11.2 and 11.8 seconds. On average
tekilochka [14]

Using the mean concept, it is found that on average, it takes him 11.9 seconds to run a 100 yard dash.

<h3>What is the mean?</h3>

The mean of a data-set is given by the <u>sum of all observations in the data-set divided by the number of observations</u>.

In this problem, the three observations are given by:

12.7 s, 11.2 s, 11.8 s.

Hence the mean is:

M = (12.7 + 11.2 + 11.8)/3 = 11.9.

On average, it takes him 11.9 seconds to run a 100 yard dash.

More can be learned about the mean of a data-set at brainly.com/question/24628525

#SPJ1

4 0
2 years ago
Three raised to the square of a number, x, is equal to nine raised to the power two times the same number x decreased by one.
Lady bird [3.3K]

Answer:

Step-by-step explanation:

3^x^2=9^{2x-1}\\3^x^2=(3^2)^{2x-1}\\x^2=4x-2\\x^2-4x+2=0\\X^2-4X+4=-2+4\\(X-2)^2=2\\|x-2|=\pm \sqrt{2} \\x=2+\sqrt{2},2-\sqrt{2}

6 0
3 years ago
If x^2-13x+42=(x+A)(x+B), then find the value of 3A-B
tigry1 [53]

Answer:

- 11 or - 15

Step-by-step explanation:

Factorise

x² - 13x + 42

Consider the factors of the constant term (+ 42) which sum to give the coefficient of the x- term (- 13)

The factors are - 6 and - 7, since

- 6 × - 7 = + 42 and - 6 - 7 = - 13, thus

x² - 13x + 42 = (x - 6)(x - 7)

compare to (x + A)(x + B)

A = - 6, B = - 7

thus 3A - B = 3(- 6) - (- 7) = - 18 + 7 = - 11

The factors may also be expressed as (x - 7)(x - 6)

with A = - 7 and B = - 6, then

3A - B = 3(- 7) - (- 6) = - 21 + 6 = - 15

5 0
4 years ago
Secx-cosx/tanx=___? Explain pls ...?
harkovskaia [24]
\frac{secx- cos x}{tan x}= \\ = \frac{ \frac{1}{cos x} -cos x}{ \frac{sinx}{cos x}}= \\ = \frac{ \frac{1-cos ^{2} x}{cos x} }{ \frac{sinx}{cos x} }= \\ = \frac{sin ^{2} x}{sin x}=
= sin x
6 0
3 years ago
Please help with this I don’t understand it at all!
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Please provide a larger picture
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3 years ago
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