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4 years ago

Algebra 2B Review of Trig/Statistics I really need help

Mathematics

1 answer:

alekssr [168]4 years ago

3 0

$\sin B$ is the ratio of the length of the leg opposite angle B to the length of the hypotenuse:

$\sin B=\dfrac{21}{29}$

It will be the same as $\cos A$ , which is the ratio of the length of the leg adjacent to angle A to the lenght of the hypotenuse.

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Chứng minh: x² - 8x + 17 > 0

monitta

Answer: All Real Numbers

x2−8x+17>0

x2−8x+17=0

For this equation: a=1, b=-8, c=17

1x2+−8x+17=0

−b±√b2−4ac

(Use quadratic formula with a=1, b=-8, c=17)

−(−8)±√(−8)2−4(1)(17)

2(1)

8±√−4

All real numbers

8 0

3 years ago

A round table top has a diameter of 2.6 meters.What is its surface area

sergij07 [2.7K]

Hello!

To find the area of a circle you use the equation

$\pi r^{2}$

r is radius which is half the diameter

r = 2.6 / 2

r = 1.3

Put in the values you know

$\pi 1.3^{2}$

Square the number

$1.69 \pi = 5.31$

The answer is $1.69 \pi$ or ≈5.31

Hope this helps!

8 0

3 years ago

Read 2 more answers

Find the value of x

hichkok12 [17]

Answer:

answer is x = 152°

if you didn't understand, please care to let me know

5 0

3 years ago

A university has 31,560 students. In a random sample of 180 students, 12 speak three or more languages. Predict the number of st

kodGreya [7K]

<h3>Hello there!</h3>

Here's the information given to us written out:

- 31560 total students

- 12/180 students speak 3 or more

To solve:

To solve this, use the probability from the survey of 180 students to make a reasonable estimate for the 31560 total students.

12/180 students were able to speak 3 or more languages. This proportion, of 12 students : 180 students can be adjusted.

Just like when simplifying fractions, both sides can have an operation (of multiplication or division) done to it and still be equivalent.

In this case, we want to set the side of total students to be equivalent to 31560 to get the estimated number of students that speak 3 or more languages.

To get the number to multiply both sides by:

31560 / 180 = 175 1/3 = 526/3

Now, carry out the operation - multiply both sides by that number.

12/180 = (12 * 526/3) / (180 * 526/3) = 2104 / 31560

So, out of 31560, using the same probability, around 2104 students would speak 3 or more languages.

Hope this helped!

3 0

4 years ago

What is the volume of a rectangular prism whose length is 2x+1 units, width is x-2 units, and whose height is 3x units?

Helen [10]

Answer:

V = 6x^3 - 9x^2 - 6x (which matches the third answer choice)

Step-by-step explanation:

The volume of a rectangular prism of length L, depth W and height H is

V = L * W * H.

Thus,

in this case,

V = (2x + 1)(x - 2)(3x).

The order in which we multiply these quantities together is immaterial.

Working from left to right, we get:

V = (2x^2 - 3x - 2)(3x), and then:

V = 6x^3 - 9x^2 - 6x (which matches the third answer choice)

4 0

3 years ago