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3 years ago

It is a 3 km hike to the river PJ walks for 500 m then he walks another 1050 m how

1 answer:

5 0

He must walk 1.45 more kilometers.
1050 meters and 500 meters add are 1550 meters.
1550 meters then convert to 1.55 kilometers.
You subtract 1.55 from 3 and get 1.45 kilometers.

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Solve the equation 2x^2-3x-6=0 give your answer correct to two decimal places

IRISSAK [1]

Answer:

Step-by-step explanation:

2x² - 3x - 6 = 0

Using the quadratic formula

$x = \frac{ - b± \sqrt{ {b}^{2} - 4ac} }{2a}$

a = 2 , b = - 3 , c = 6

Substituting the values into the above formula

We have

$x = \frac{ - - 3± \sqrt{ { - 3}^{2} - 4(2)( - 6)} }{2(2)}$

$x = \frac{3± \sqrt{9 +48 } }{4}$

$x = \frac{3± \sqrt{57} }{4}$

$x = \frac{3 - \sqrt{57} }{4} \: \: \: \: or \: \: \: \: \: x = \frac{3 + \sqrt{57} }{4}$

We have the final answer as

Hope this helps you

6 0

3 years ago

Let x1, x2, ...x64 be a random sample from a distribution with mean 64 and standard deviation 4. then mean and the standard devi

VARVARA [1.3K]

The mean of sample means is the same as the mean of the underlying distribution.

The standard deviation of sample means is the original distribution sample mean divided by the square root of the number of samples.

Mean of sample mean distribution: 64

SD of sample mean distribution: 4/√64 = 1/2

7 0

3 years ago

The image below is a triangle drawn inside a circle with center O: A triangle is shown inscribed inside a circle. The leg of the

Elis [28]

The area of a circle is given in terms of its radius by

A = π · r²

Your circle has r=4 (half the diameter) and you want π=3.14. Using these values in the formula gives

A = 3.14 · 4²

This matches your first selection

3.14 · 4²

<em> MARK AS BRAINLIEST</em>

7 0

3 years ago

I JUST NEED THESE 3 QUESTIONS

Sidana [21]

Answer:

1. What is the period and the amplitude of the sine function representing the position of the band members as they begin to play?

Answer: Amplitude is 80 ft, period is 60 ft.

2. Edna is sitting in the stands and is facing Darla. Edna observes that sine curve begins by increasing at the far left of the field. What is the equation of the sine function representing the position of band members as they begin to play?

Answer: y = 80cos(x*π/30)+80

3. As the band begins to play, band members move away from the edges, and the curve reverses so that the function begins at the far left by decreasing. Darla does not move. The sine curve is now half as tall as it was originally. What is the equation of the sine curve representing the position of the band members after these changes?

Answer: y = 40cos(x*π/30)+80

4. Next, the entire band moves closer to the edge of the football field so that the sine curve is in the lower half of the football field from Edna’s vantage point. What is the equation of the sine curve representing the position of the band members after these changes?

Answer: y = 40cos(x*π/30)+40

Step-by-step explanation:

8 0

3 years ago

What are the solutions to the equation x2 - 8x = 10

mojhsa [17]

Answer:

x = 4 ±√26

Step-by-step explanation:

Please write this as x^2 - 8x = 10, or x^2 - 8x - 10 = 0. " ^ " indicates exponentiation.

Let's complete the square:

x^2 - 8 x can be rewritten as

x^2 - 8x + 16 - 16, and so

x^2 - 8x = 10 becomes x^2 - 8x + 16 - 16 - 10 = 0, or

(x - 4)^2 = 26

Taking the square root of both sides, we get:

x - 4 = ±√26, or

x = 4 ±√26

5 0

3 years ago