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Rus_ich [418]
3 years ago
9

What is the answer to thos equation? (2×4)=1 2/4 + 1/2x​

Mathematics
2 answers:
zhannawk [14.2K]3 years ago
7 0
8 = 3 + 1/2x
5 = 1/2x
x = 5/(1/2)
x = 10
Natasha2012 [34]3 years ago
7 0

Answer:

X = 10

Step-by-step explanation:

4 x 2 is 8 and 12/4 is 3 so the rewritten equation is

8 = 3 + 1/2x

multiply by 2 because its a fraction

16=6+x

Inverse the 6

10=x

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19.Marvin is working on a problem for his geometry class. He has to determine if quadrilateral ABCD is a parallelogram, and if s
LenKa [72]

Answer:

<h2>Square.</h2>

Step-by-step explanation:

The parallelogram that has those characteristics is the square.

The square is perfectly symmetric, both diagonals are congruent, because all sides of the square are congruent. Also, the diagonals bisects each angle of the square, creating triangles. Those triangles have 45° angles at their base and the third-angle is 90°, that is, it's a right triangle, where that right angle is between diagonals.

Therefore, a square has congruent and perpendicular diagonals, they have the same midpoint, and their slopes are opposite reciprocals of each other because that's the definition of perpendicularity.

Therefore, the right answer is square.

6 0
3 years ago
What is the perimeter of CDE?
LuckyWell [14K]
<h3>Answer: 32.5 units (choice C)</h3>

This value is approximate.

=============================================================

Explanation:

To find the perimeter, we simply add up the lengths of the three external sides.

The horizontal side from D to E is 16 units long since |-10-6| = 16. I subtracted the x coordinates of the points and applied absolute value. You could also count out the spaces and you should count 16 spaces from D to E.

Unfortunately, the diagonal lengths aren't as straight forward. We have two options here: The pythagorean theorem, or the distance formula.

I'll go with the distance formula.

Let's find the distance from C to D, aka the length of side CD

C = (x1,y1) = (-1,-2)\\\\D = (x2,y2) = (-10,0)\\\\d = \sqrt{(x_1 - x_2)^2 + (y_1 - y_2)^2}\\\\d = \sqrt{(-1-(-10))^2 + (-2-0)^2}\\\\d = \sqrt{(-1+10)^2 + (-2-0)^2}\\\\d = \sqrt{(9)^2 + (-2)^2}\\\\d = \sqrt{81 + 4}\\\\d = \sqrt{85}\\\\d \approx 9.2195\\\\

Side CD is roughly 9.2195 units long.

Repeat this idea to find the length of CE

C = (x1,y1) = (-1,-2)\\\\E = (x2,y2) = (6,0)\\\\d = \sqrt{(x_1 - x_2)^2 + (y_1 - y_2)^2}\\\\d = \sqrt{(-1-6)^2 + (-2-0)^2}\\\\d = \sqrt{(-7)^2 + (-2)^2}\\\\d = \sqrt{49 + 4}\\\\d = \sqrt{53}\\\\d \approx 7.2801\\\\

Side CE is roughly 7.2801 units long

The perimeter of triangle CDE is approximately...

P = DE+CD+CE

P = 16 + 9.2195 + 7.2801

P = 32.4996

This then rounds to 32.5 units. The answer is choice C.

7 0
3 years ago
Determine whether the equation represents a direct variation. If it does, find the constant of variation. 7x = −6y
s2008m [1.1K]
The constant variation -7/6
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Ilya [14]

Answer:

20%

Step-by-step explanation:

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4 years ago
How do I do this ? 19 points will mark brainlest
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Answer: This is easier than you thought. 3.2 is equivalent to 3.20 so the spaces between would be 3.21, 3.22, 3.23 etc. the blue dot is 3.21

Step-by-step explanation:

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3 years ago
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