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3 years ago

Answer to the question please

Mathematics

2 answers:

yuradex [85]3 years ago

8 0

Answer:

∠ 2 = 160°

Step-by-step explanation:

1 and 2 are adjacent angles and are supplementary, thus

1 + 2 = 180° , that is

20° + 2 = 180° ( subtract 20° from both sides )

A = 160°

sertanlavr [38]3 years ago

7 0

Answer:

it is 40*

Step-by-step explanation:

because you know 1 and 3 is 20*

so that would make 2 and 4 the same

witch is 40*

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Using the distance formula, when I plugged in the information, the answer I got was the square root of 85. (B)

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3 years ago

Read 2 more answers

6|6-4x|=8x+4 Need help solving the equation. I need help checking the extraneous solutions too.

Vsevolod [243]

$6|6-4x|=8x+4\\\\Formula\ for\ absolute\ value\\\\
|a|=a,\ for\ a \geq 0\\ or\\|a|=-a,\ for\ a \ \ -4x \geq -6\ \ -->\ \ \ x \leq \frac{3}{2}\\\\
6(6-4x)=8x+4\\
36-24x=8x+4\ \ |subtract\ 4\\
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3 years ago

(-2)³ + 4 ÷ (-15 + 9)(3) - 4?

dsp73

Answer:

$-\frac{110}{9}$

Step-by-step explanation:

Given expression is $(-2)^{3} +4/(-15+9)(3)-4$

Let us perform the operations inside the parentheses first.

$-8 +4/(-6)(3)-4$

$-8 +4/(-18)-4$

$-8-\frac{4}{18} -4$

$=-12-\frac{4}{18}$

$=-12-\frac{2}{9}$

$=-\frac{110}{9}$

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4 years ago

A financial talk show host claims to have a 55.3 % success rate in his investment recommendations. You collect some data over th

baherus [9]

Answer:

There is a 25.52% probability of observating 4 our fewer succesful recommendations.

Step-by-step explanation:

For each recommendation, there are only two possible outcomes. Either it was a success, or it was a failure. So we use the binomial probability distribution to solve this problem.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

In this problem we have that:

$p = 0.553, n = 10$

If the claim is correct and the performance of recommendations is independent, what is the probability that you would have observed 4 or fewer successful:

This is

$P(X \leq 4) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) + P(X = 4)$