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kozerog [31]
3 years ago
14

Which matrix equation represents this linear system?

ormula1" title="2x-7y=-1\\x+3y=-5" alt="2x-7y=-1\\x+3y=-5" align="absmiddle" class="latex-formula">

Mathematics
2 answers:
Vedmedyk [2.9K]3 years ago
4 0

B

2x - 7y =  - 1 \\  \\  \\ 1. \: 2x =  - 1 + 7y \\ 2. \: 2x = 7y - 1 \\ 3. \: x =  \frac{7y - 1}{2}

Nikolay [14]3 years ago
3 0

Answer:

The answer is the letter B.

The first column represents the x-values, and the second row represents the y-values.

For that reason, if we have:

2x - 7y = -1

x + 3y = -5

Then, the matrix will be given by:

[ 2      -7

 1        3]

Then, the third colum will be the equality:

[ -1

 -5]

So the correct option is the letter B.

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What is the volume of the triangular prism?
Oksi-84 [34.3K]

Answer:

B) 115.5m^3

Step-by-step explanation:

to find the volume we need to find first the area of the triangle, and then multiply by 11 which is the length of the prism:

the measurements are:

base=7m

height=3m

length=11m

the area of the triangle in one side is:

triangle=\frac{(base)(height)}{2} \\triangle=\frac{(7m)(3m)}{2}\\ triangle=\frac{21m}{2}\\ triangle=10.5m^2

and now to find the volume of the prism we multiply the area of the triangle by the length of the prism:

volume=(triangle)(height)\\volume=(10.5m^2)(11m)\\volume=115.5m^3

which is option B)

4 0
3 years ago
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Answer:

option (a)

Step-by-step explanation:

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6 0
3 years ago
David went to a fast-food shop for a meal in a late evening. Only steak, pork chop and grilled chicken were available for main c
Doss [256]

six

Step-by-step explanation:

the reason is this: let steak be (s), pork  be (p), grilled chicken be (gc), tea be (t), and coffee be (c)

now, we want to find the total number of outcomes, and this cannot be determined by a simple roll of the dice. you have to count the sample space required for EVERY outcome, and it has to lie within the conditions. so, assuming David only takes 1 main course and 1 drink, he would be down to six  option, which are :

1. s & t

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3 years ago
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d1i1m1o1n [39]

Answer:

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7 0
3 years ago
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k0ka [10]

Answer:

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