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STatiana [176]
3 years ago
14

Are braces are used in interval notation or roster notation?

Mathematics
1 answer:
antoniya [11.8K]3 years ago
7 0

In Mathematics, braces ( {} )are used to symbolize the group of mathematical terms, commonly as the outmost measurement in a difficult expression. Braces are used in roster notation. Wherein within the braces there are a set of elements, which are separated by commas after each element. The set may be a set of whole numbers, or a set of natural numbers, or even a set of integers. While in Interval Notations, brackets and parentheses are used to indicate, whether the endpoints are left out or contained within.

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In triangle ABC, point D is the centroid, and BD = 6. Find BE.
pshichka [43]

Given:

In triangle ABC, point D is the centroid, and BD = 6.

To find:

The measure of side BE.

Solution:

We know that the centroid divides each median in 2:1.

In the given figure BE is a median and point D is the centroid. It means point D divides the segment BE in 2:1.

Let BD and DE are 2x and x respectively.

We have, BD = 6 units.

2x=6

x=\dfrac{6}{2}

x=3

Now,

BE=BD+DE

BE=6+x

BE=6+3

BE=9

Therefore, the measure of side BE is 9 units.

6 0
3 years ago
Which is the equation of the parabola?
Umnica [9.8K]

Answer: y=-\dfrac{1}{8}(x - 2)^2 - 3

<u>Step-by-step explanation:</u>

The vertex form of a parabola is: y = a(x - h)² + k    where

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NOTE: p is the distance from the vertex to the focus

The vertex (h, k) is (2, -3)

p=-2\quad \implies\quad a = \dfrac{1}{4(-2)}=-\dfrac{1}{8}

Insert those values into the vertex formula to get:

y=-\dfrac{1}{8}(x - 2)^2 - 3

4 0
3 years ago
The sixth grade band students are selling magazines to raise money for new instruments. As a reward for selling, the students ea
dexar [7]

Answer:

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2 years ago
Determine the lateral area and the surface area of a right rectangular prism that has rectangular bases measuring 2" x 4" and a
morpeh [17]
So hmm notice the picture below

a rectangular prism, is just 6 rectangles stacked up to each other
so... to find the Surface Area, just get the area of each rectangle, notice is 3 pairs of similar rectangles, so, get their area and sum them up, that's the Surface Area of the rectangular prism

now, the Lateral Area, is just the area of the sides, laterals, so, that means, just get add up the areas of the rectangles upfront, on the back, and the ones on left and right sides, that's the Lateral Area of the rectangular prism.

8 0
3 years ago
If you wouldn’t mind helping me I would greatly appreciate it. I’ve been having trouble on problems like this, and I have no one
Nikitich [7]
A.3/5 jehevdhe egecsgcsg feud
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