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3 years ago

If we multiply every observation in a data set by 2, the mean will

Mathematics

1 answer:

Pie3 years ago

5 0

If the values increase then the mean will as well, but if only the observations increase, the mean will decrease.

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A runner runs around a circular track. He completes one lap at a time of t = 269 s at a constant speed of v = 4.6 m/s. What is t

AURORKA [14]

Answer:

$\boxed{\text{197 m}}$

Step-by-step explanation:

The formula relating distance (d), speed (s), and time (t) is

d = st

1. Calculate the distance

d = 269 s × 4.6 m·s⁻¹ = 1240 m

2.Calculate the track radius

The distance travelled is the circumference of a circle

$\begin{array}{rcl}C & = & 2 \pi r\\1240 & = & 2 \pi r\\\\r & = & \dfrac{1240}{2 \pi }\\\\& = & 197\\\end{array}\\\text{The radius of the track is }\boxed{\textbf{197 m}}$

5 0

4 years ago

Find the area of a triangle where the base is 3 3/4 in and the height is 4 inches.

sergeinik [125]

A=30
Multiply base times height and then divide by 1/2
(3 3/4)(4)=15
15/(1/2) = 30

8 0

3 years ago

100 POINTS! Using the following equation, find the center and radius of the circle. You must show and explain all work and calcu

omeli [17]

Answer:

Center: (-4, 1)

Radius: √2

Explanation:

Circle general equation is represented by (x - h)² + (y - k)² = r²

where (h, k) is the center and "r" resembles radius

To write in general equation form, start completing square:

x² + y² + 8x -2y + 15 = 0

x² + 8x + y² - 2y + 15 = 0

(x + 4)² - 4² + (y - 1)² - (-1)² + 15 = 0

(x + 4)² + (y - 1)² - 16 - 1 + 15 = 0

(x + 4)² + (y - 1)² - 2 = 0

General equation form:

(x - (-4))² + (y - 1)² = (√2)²

From here, comparing with the formula equation.

It is determined: center: (-4, 1) and radius: √2

5 0

2 years ago

Read 2 more answers

When is election day, and what age can a person vote?

True [87]

Answer:Tuesday,November 3

Step-by-step explanation:Voting age. A voting age is a minimum age established by law that a person must attain before they become eligible to vote in a public election. Today, the most common voting age is 18 years; however, voting ages as low as 16 and as high as 25 currently exist (see list below).

7 0

3 years ago

Read 2 more answers

7) Which ordered pair is a solution of the equation 3y – 2 = 8x + 5? *

Ksenya-84 [330]

<span>If you plug in the values with their respective x and y variables you can find out.

For (1, 5):
3y - 2 = 8x + 5
3(5) - 2 = 8(1) + 5
15 - 2 = 8 + 5
13 = 13

This is indeed correct because 13 equals 13.</span>

3 0

3 years ago