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notsponge [240]
3 years ago
15

Which matrix below represents 3 X 3 Identity Matrix (LaTeX: I_{3} I 3).

Mathematics
1 answer:
miskamm [114]3 years ago
8 0

Answer:

D

Step-by-step explanation:

Matrix D represents 3 x 3 identity matrix.

Because all elements of principal diagonal are 1 and others are zero.

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The height of an ostrich is 20 inches more than 4 times the height of a kiwi. If an ostrich is 108 inches tall, how tall is a ki
pishuonlain [190]
Let the height of the kiwi be x, then the height of the ostrich is 20 + 4x.
20 + 4x = 108
4x = 108 - 20 = 88
x = 88/4 = 22
The height of the kiwi is 22 inches.
6 0
3 years ago
Paula spent 3/8 of her allowance on clothes and 1/6 on entertainment what fraction of her allowance did she spend on other items
Alexandra [31]
3/8=9/24 and 1/6=4/24
9/24+4/24=13/24
Paula spent 13/24 of her allowance on other items.
8 0
3 years ago
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You need to solve a system of equations. You decide to use the elimination method. Which of these is not allowed? 2x - 3y = 12
suter [353]

Answer:

A.

Step-by-step explanation:

The Elimination Method is the method for solving a pair of linear equations which reduces one equation to one that has only a single variable.

If the coefficients of one variable are opposites, you add the equations to eliminate a variable, and then solve.

If the coefficients are not opposites, then we multiply one or both equations by a number to create opposite coefficients, and then add the equations to eliminate a variable and solve.

When multiplying the equation by a coefficient, we multiply both sides of the equation (multiplying both sides of the equation by some nonzero number does not change the solution).

So, option B is not allowed (it is not allowed to multiply only one part of the equation)

6 0
3 years ago
What is y when x = 60?
Virty [35]
Y can be any number with the given question

5 0
3 years ago
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F(x)=7x+9 find f(6c-4)<br><br> a.35c+9 b.42c+9<br><br> c.42c-19 d.42c-19
Lapatulllka [165]
C & D Answer Choices Are The Same, Your Answer Is 42c-19

f(x) =  \: all \: x \: in \: (7x + 9)
f(x) = 7x + 9
f(6c - 4) = 7x + 9
*Distributive Property
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f(6c - 4) = 42c - 28 + 9
f(6c - 4) = 42c - 19

4 0
3 years ago
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