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3 years ago

1. If x is the supplementary angle of 155°,

Mathematics

1 answer:

ValentinkaMS [17]3 years ago

6 0

Answer:

0.466 degree is the. answer

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There are 10 girls and 6 boys in a class. The teacher randomly draws one student's name and then draws another. What is the prob

kumpel [21]

Answer:

25%

Step-by-step explanation:

6 0

3 years ago

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Insurance companies are interested in knowing the population percent of drivers who always buckle up before riding in a car. The

Tems11 [23]

Answer:

The 84% confidence interval for the population proportion that claim to always buckle up is (0.74, 0.80).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the z-score that has a p-value of $1 - \frac{\alpha}{2}$ .

They randomly survey 387 drivers and find that 298 claim to always buckle up.

This means that $n = 387, \pi = \frac{298}{387} = 0.77$

84% confidence level

So $\alpha = 0.16$ , z is the value of Z that has a p-value of $1 - \frac{0.16}{2} = 0.92$ , so $Z = 1.405$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.77 - 1.405\sqrt{\frac{0.77*0.23}{387}} = 0.74$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.77 + 1.405\sqrt{\frac{0.77*0.23}{387}} = 0.8$

The 84% confidence interval for the population proportion that claim to always buckle up is (0.74, 0.80).

6 0

3 years ago

8+ (-4)= ?<br><br>What does 8+ (-4) equal to?

Dafna1 [17]

Answer:

Step-by-step explanation:

When you add a positive number with a negative number, it technically turns into a subtraction equation. So, the easier way to look at the equation is 8-4=4

6 0

3 years ago

Read 2 more answers

Please help me and don't put sum bs answer or a link

Liono4ka [1.6K]

Answer:

Both X and Y are equal to 15 multiply by the square root of 2.....(i just do not know how to type the symbol on my keyboard)

Step-by-step explanation:

So for X:

X=30 sin 45

=15 multiply by the square root of 2

For Y:

Y=30 cos 45

=15 multiply by the square root of 2

But you could also use theorem of Pythagoras

8 0

3 years ago

Carrie missed 9.6% of the problems on a test. The test had a total of 125 problems.

Nataly_w [17]

Answer:

G 13

Step-by-step explanation:

X/125 = 9.6%/100%

125*(9.6) / 100 = 12;

BEST estimate 13

7 0

3 years ago