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vesna_86 [32]
3 years ago
6

Can someone help me with this math homework please!

Mathematics
2 answers:
katen-ka-za [31]3 years ago
6 0
SrretrdeEtddexesesesezwzwzez
bazaltina [42]3 years ago
3 0

OPTION A is the correct answer.

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Csc^2x – 5 csc x = 0
kompoz [17]

Answer:

x ≈ 11.5° or 168.5°

Step-by-step explanation:

csc² x − 5 csc x = 0

Factor:

csc x (csc x − 5) = 0

Set each factor to 0 and solve:

csc x = 0

sin x = undefined

no solution

csc x − 5 = 0

csc x = 5

sin x = 1/5

x = arcsin(1/5)

x ≈ 11.5° or 168.5°

3 0
4 years ago
{-2x+y=0<br> 5x+3y=-11<br> Solve the substitution
Rzqust [24]

\bf \begin{cases} -2x+y=0\\ \boxed{y} = 2x\\[-0.5em] \hrulefill\\ 5x+3y=-11 \end{cases}\qquad \qquad \implies \stackrel{\textit{substituting on the 2nd equation}}{5x+3\left( \boxed{2x} \right)=-11} \\\\\\ 5x+6x=-11\implies 11x=-11\implies x = \cfrac{-11}{11}\implies \blacktriangleright x = -1 \blacktriangleleft \\\\\\ \stackrel{\textit{we know that}}{y = 2x}\implies \blacktriangleright y = -2 \blacktriangleleft \\\\[-0.35em] ~\dotfill\\\\ ~\hfill (-1~~,~~-2)~\hfill

7 0
3 years ago
Safety regulations state that roller coasters cannot operate safely in heavy rains. Throughout the day, ride operators measure t
Tju [1.3M]

Answer:

Type I error:

a. The rainfall is minimal enough to operate safely, and the ride is shut down.

Type II error:

d. The rainfall is too heavy to operate safely, and the ride continues to operate.

Step-by-step explanation:

In this case:

The null hypothesis (H0) states that mean rainfall is minimal

The alternative hypothesis (H1) states that mean rainfall is heavy.

A type I error occurs if one rejects the null hypothesis when it is actually true.

In this case; if the rainfall is minimal enough to operate safely and the ride is shut down is an example of Type I error because the null hypothesis is true and it is rejected.

A type II error occurs if one does not reject the null hypothesis when it is false, that is one accept the null hypothesis when it is false.

In this case; the null hypothesis is false and it is accepted is an example of type II error. So, the rainfall is too heavy to operate safely (means null hypothesis is false) and the ride continues to operate (means the null hypothesis is accepted when it is false).

5 0
4 years ago
Car X leaves Northtown traveling at a steady rate of 55 mph.  Car Y leaves 1 hour later following Car X, traveling at a steady r
Elis [28]
Unfortunately, you haven't shared the equations from which you're supposed to choose your answer.

But we can write our own.

When will the distance traveled by the 1st car = the distance traveled by the 2nd car?

55 miles + (55 mph)x = (60 mph)x

solve this for x:  55 miles = (60-55)x mph = 5 mph

x=11 hours

The two cars are the same distance from the starting point after 11 hours.
4 0
4 years ago
Mrs. Speas has $138 in her bank account during Week #1. At the end of each week, she deposits $55 into her bank account. What is
nordsb [41]

The first term is 138

The difference is 55

The iterative rule for the amount of money Mr Speas has after n weeks is

55/2 n² + 221/2 n

During the first week she has $138 in his bank account. At the end of each week she deposited $55 into her bank account.

The first term will be 138 .

The common difference is 55 because her bank always increase by $55 dollars every week. The sequence will be 138, 193, 248, 303, 358...…

The difference = 193 - 138 = 55.

The iterative rule for the amount of money Mr Speas has after n weeks can be represented  below

n = number of weeks

a = first term = 138

d = common difference = 55

Using AP formula,

sₙ = n/2(2a + (n - 1)d)

sₙ = n/2 (2(138)+ (n - 1)55)

sₙ = n /2(276 + 55n -55)

sₙ = n /2(221 + 55n)

sₙ = 55/2 n² + 221/2 n

read more: brainly.com/question/20373665?referrer=searchResults

6 0
2 years ago
Read 2 more answers
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