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kaheart [24]
3 years ago
14

Which of the following is not a property of quadrilaterals?. . A.. There are four sides.. B.. There are four diagonals.. C.. The

re are four vertices.. D.. The measures of the interior angles add up to 360.
Mathematics
1 answer:
Alex Ar [27]3 years ago
8 0
The correct answer for this question is letter "(B) <span>There are four diagonals." It is not a property of quadrilaterals. Among the properties of quadrilaterals include (1) </span>There are four sides, (2) There are four vertices, (3) <span>The measures of the interior angles add up to 360.</span>
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A high school student named David Merrell did a study of how music affects the ability of rats to run a maze. He trained 71 rats
Alona [7]

Step-by-step explanation:

Heavy Metal "music" impacts negatively the long term memory, if at least the ability to access it.

while harmonic music has no blocking effect or maybe even strengthens the long term memory and the ability to access it.

here 3 remarks.

first 2 scientifically from psychology : memory works mostly associative. that means brains do not store absolute information like a digital computer, but always in combination and association with other pieces of information. if there is nothing else to remember (like a more or less random pattern of sound effects for that the brain cannot find a rule or concept for), there are no associations with presented pieces of information, and the storage and access to it is much harder and restricted.

and - loud crashing and seemingly random noise triggers the panic mode in our brains. and panic is the mode favoring pure instinct and suppressing cognitive functions.

and finally, personally, it just confirms what I literally feel when listening to such music : it destroys at that moment any ability to keep a straight thought, prolonged exposure gives me the feeling that something gets broken inside my brain and thought processes.

I suspect that this is exactly the feeling that the fans of this kind of music are after (kind of like most drugs), but I am not surprised that there actually is something broken in the brain (again, as with drugs).

4 0
2 years ago
Wat is 2 1/3 in a decimal
Phantasy [73]
2 1/3= 2.333333333
hopes this helps
6 0
3 years ago
Read 2 more answers
What is 34 less than the product of 14 and a unknown number of is 78. what is the unknown number?
AysviL [449]
It is extremely important to understand the words of the given problem. There are numerous information's of immense importance that are already given in the question. Based on those information's the answer to the question can be easily deduced.
Let us assume the unknown number = x
Then
14x - 34 = 78
14x = 78 + 34
14x = 112
x = 112/14
  = 8
So the unknown number in the given question is 8. I hope the procedure is clear to you and you got the answer that you wanted.
6 0
3 years ago
A sheet of metal 12 inches by 10 inches is to be used to make a open box. Squares of equal sides x are cut out of each corner th
VLD [36.1K]

Answer:

1.81 inches

Step-by-step explanation:

We are told that the sheet of metal to be used measures 12 inches by 10 inches.

Squares of equal sides x are cut out of each corner. Thus, it means total of 2x is cut of the 12 inches side and 10 inches side.

Thus;

Length; L = 12 - 2x

Width; W = 10 - 2x

Height; H = x

Volume of the box is;

V = LWH

V = (12 - 2x)(10 - 2x)x

Factorizing out, we have;

V = 4x[(6 - x)(5 - x)]

Equating V to zero, we can find the domain of the function;

At V = 0,

4x = 0; 6 - x = 0 ; 5 - x = 0

x = 0, x = 6, x = 5

The dimensions have to be positive. Thus;

0 ≤ x ≤ 5

Expanding the volume equation;

V = 4x[30 - 5x - 6x + x²]

V = 4x[30 - 11x + x²]

V = 4x³ - 44x² + 120x

dV/dx = 12x² - 88x + 120

Equating to zero to find the value of x that makes volume maximum;

12x² - 88x + 120 = 0

Using quadratic formula gives;

x = 1.81 or 5.52

From our domain, we have 0 ≤ x ≤ 5.

1.81 falls within the domain and therefore we will pick it as the height that makes the volume maximum.

8 0
3 years ago
Read 2 more answers
X=12; f(x) = (1/2)x -20 = <br><br> a.4<br> b.7<br> c.-14<br> d.-26
raketka [301]

Answer:

c

Step-by-step explanation:

that's the answer dudnjdkdkd

3 0
3 years ago
Read 2 more answers
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