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3 years ago

Solve the equation 1.9 x 5.5 = ___ by arranging the decimal numbers vertically.

Mathematics

2 answers:

SSSSS [86.1K]3 years ago

6 0

it’s 10.5 the answer is it’s 10.5

Troyanec [42]3 years ago

4 0

Answer:

its 10.5

Step-by-step explanation:

i did the math 1.5 if you move the decimal

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An airline claims that the no-show rate for passengers is less than 5%. In a sample of 420 randomly selected reservations, 19 we

aleksandr82 [10.1K]

Answer:

An airline claims that the no-show rate for passengers is less than 5%. In a sample of 420 randomly selected reservations, 19 were no-shows. At α=0.01, test the airline's claim. State the sample percentage and round it to three decimal places.

State the hypotheses.

State the critical value(s).

State the test statistics.

State the decision

State the conclusion.

3 0

2 years ago

Solve sin 0 + 1 = cos20 on the interval 0 ≤ 0 < 2pi. Show work please!

yan [13]

Answer:

$\theta=\frac{\pi}{2},\frac{3\pi}{2}\frac{2\pi}{3}\frac{4\pi}{3}$

Step-by-step explanation:

You need 2 things in order to solve this equation: a trig identity sheet and a unit circle.

You will find when you look on your trig identity sheet that

$cos(2\theta)=1-2sin^2(\theta)$

so we will make that replacement, getting everything in terms of sin:

$sin(\theta)+1=1-2sin^2(\theta)$

Now we will get everything on one side of the equals sign, set it equal to 0, and solve it:

$2sin^2(\theta)+sin(\theta)=0$

We can factor out the sin(theta), since it's common in both terms:

$sin(\theta)(2sin(\theta)+1)=0$

Because of the Zero Product Property, either

$sin(\theta)=0$ or

$2sin(\theta)+1=0$

Look at the unit circle and find which values of theta have a sin ratio of 0 in the interval from 0 to 2pi. They are:

$\theta=\frac{\pi}{2},\frac{3\pi}{2}$

The next equation needs to first be solved for sin(theta):

$2sin(\theta)+1=0$ so

$2sin(\theta)=-1$ and

$sin(\theta)=-\frac{1}{2}$

Go back to your unit circle and find the values of theta where the sin is -1/2 in the interval. They are:

$\theta=\frac{2\pi}{3},\frac{4\pi}{3}$

7 0

3 years ago

SOLVING QUADRATIC EQUATIONS<br> 2) Solve 2x2 - 5 = 27

Nimfa-mama [501]

Answer:

x = ±4

Step-by-step explanation:

Step 1: Write out quadratic

2x² - 5 = 27

Step 2: Add 5 to both sides

2x² = 32

Step 3: Divide both sides by 2

x² = 16

Step 4: Take the square root of both sides

x = ±4

∴ x can equal -4 or 4

7 0

3 years ago

Solve for x. x2 + 7x + 10 = 0

algol13

The answer is negative 80 or like this -80

6 0

3 years ago

Somebody who remembers this plz answer ALL the questions correctly!

professor190 [17]

Answer:

Step-by-step explanation:

22: 7/5

23: 15/4

24: 21/8

25: 9/2

26: 16/3

27: 13/7

28: 25/4

29: 32/9

30: 32/3

5 0

3 years ago