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cupoosta [38]
4 years ago
8

Please help!!!! i tried putting into a calculator but i am pretty sure i am incorrect :((

Mathematics
2 answers:
Serga [27]4 years ago
6 0

Answer:

hey

Step-by-step explanation:

formula used here

<h2>cos inverse (-theta)= π- cos inverse theta</h2>

see the attachment above

option c

dimulka [17.4K]4 years ago
4 0

Answer:

(2 - π) / 4

Step-by-step explanation:

cos⁻¹(- √3 /2)) = cos⁻¹ (-0.866) = 150°

sin 150° = 0.5 = 1/2

sin (- π /2) = -1

tan (sin (- π /2)) = tan (-1) = - 45° = - π / 4

1/2 + (- π /4) = (2 - π) / 4

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Katen [24]

Answer:

$17.35/h

Step-by-step explanation:

In order to get the amount per hour he made, you first need to calculate the global amount of money he made.

He was paid $2,900 then he had costs of $1,200, that leaves him a net income of $1,700 ($2,900 - $1,200)

Then he worked a total of 98 hours for that money.

A salary is an amount of money expressed by a period of time.  In this case, we'll use hours.

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S = $1,700 / 98 hours = $17.35/h

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3 years ago
Help with question three please :)
Svetllana [295]

Answer:

i believe its a

Step-by-step explanation:

3 0
3 years ago
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Add the equations.<br> 2x - 3y = -1<br> + 3x+3y= 26
Basile [38]

5x=25

Because negative 3y and positive 3y got cancelled

4 0
3 years ago
Read 2 more answers
The following is an incomplete paragraph proving that ∠WRS ≅ ∠VQT, given the information in the figure where segment UV is paral
Vikki [24]

Each of the pairs of the opposite angles made by two intersecting lines are called vertical angles. The correct option is A.

<h3>What are vertical angles?</h3>

Each of the pairs of the opposite angles made by two intersecting lines are called vertical angles.

The proof can be completed as,
Given the information in the figure where segment UV is parallel to segment WZ.: Segments UV and WZ are parallel segments that intersect with line ST at points Q and R, respectively. According to the given information, segment UV is parallel to segment WZ, while ∠SQU and ∠VQT are vertical angles. ∠SQU ≅ ∠VQT by the Vertical Angles Theorem. Because ∠SQU and ∠WRS are corresponding angles, they are congruent according to the Corresponding Angles Theorem. Finally, ∠VQT is congruent to ∠WRS by the Transitive Property of Equality.

Hence, the correct option is A.

Learn more about Vertical Angles:

brainly.com/question/24460838

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6 0
2 years ago
To test if the mean IQ of employees in an organization is greater than 100, a sample of 30 employees is taken and the value of t
ivolga24 [154]

Answer:

p_v =P(t_{(29)}>1.42)=0.0831  

For this case the p value calculated is higher than the significance level used of 0.05 so then we have enough evidence to FAIL to reject the null hypothesis and the best conclusion for this case would be:

a) do not reject the null hypothesis and conclude that the mean IQ is not greater than 100

Step-by-step explanation:

Information given

We want to verify if he mean IQ of employees in an organization is greater than 100 , the system of hypothesis would be:  

Null hypothesis:\mu \leq 100  

Alternative hypothesis:\mu > 100  

The statistic for this case is given by:

t=\frac{\bar X-\mu_o}{\frac{s}{\sqrt{n}}}  (1)  

The statistic calculated for this case  t_{calc}= 1.42

The degrees of freedom are given by:

df=n-1=30-1=29  

Now we can find the p value using tha laternative hypothesis and we got:

p_v =P(t_{(29)}>1.42)=0.0831  

For this case the p value calculated is higher than the significance level used of 0.05 so then we have enough evidence to FAIL to reject the null hypothesis and the best conclusion for this case would be:

a) do not reject the null hypothesis and conclude that the mean IQ is not greater than 100

5 0
3 years ago
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