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tatyana61 [14]
3 years ago
14

Can someone Explain the whole matrices chapter? Like only the basic, addition, subtraction, multiplication and division, of matr

ices please? As this may have a huge answer, I have given 25 points!!
Mathematics
1 answer:
Free_Kalibri [48]3 years ago
5 0

Step-by-step explanation:

The important rule to know is that when adding and subtracting matrices, first make sure the matrices have the same dimensions. In order words, you can add or subtract a 2x3 with a 2x3 or a 3x3 with a 3x3. However, you cannot add a 3x2 with a 2x3 or a 2x2 with a 3x3.

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Can someone help me figure this out no guessing
laiz [17]
Your answer is x = 2.92 = 3.
To answer this question you need to use trigonometry, so the first step is to identify the hypotenuse, opposite, and adjacent.
Because the angle 73 is in the bottom corner next to the length x, we know that the length x is the adjacent. The length 10 is opposite the right angle so this must be the hypotenuse.
We know that cos(θ) = adjacent/hypotenuse, so we can substitute in what we know:
cos(θ) = adjacent/hypotenuse
cos(73) = x/10
Now we can rearrange for x:
cos(73) = x/10
× 10
cos(73) × 10 = x
Finally we just type this into the calculator and get the answer as 2.92 or 3.
I hope this helps!
5 0
3 years ago
For the following set of 20 numbers:
patriot [66]

Answer:

I cannot answer all of this, so I will only answer what I can:

Q1: 13

Q3: 22.5

IQR: 13.5

IQR(1.5): 20.25

Q3 + IQR(1.5) = 43

Q1 - IQR(1.5) = -7.25

I don't know if my calculations are all right but I hope this helps! :)

4 0
3 years ago
A rectangular prism is 10 inches tall, 7 inches wide, and 3 inches long. What is the volume of the prism?
zzz [600]

Answer:volume is lengthxwidthxheight

Step-by-step explanation:

Length=3

Width=7

Height=10

3x7x10=210 inches ^3

4 0
3 years ago
Over the course of a month, a person’s weight decreases. What type of relationship is this?
Hoochie [10]
It is a negative relationship
7 0
3 years ago
Read 2 more answers
In kilometers, the approximate distance to the earth's horizon from a point h meters above the surface can be determined by eval
Maslowich
In kilometers, the approximate distance to the earth's horizon from a point h meters above the surface can be determined by evaluating the expression 

d= \sqrt{12h}

We are given the height h of a person from surface of sea level to be 350 m and we are to find the the distance to horizon d. Using the value in above expression we get:

d= \sqrt{12*350}=64.81

Therefore, the approximate distance to the horizon for the person will be 64.81 km
8 0
3 years ago
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