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77julia77 [94]
3 years ago
14

Solve the system of equations below. 3/+4,/9-12 = 17 2v1 +3,11+52 = 18 -V5-VT-12 = -6​

Mathematics
1 answer:
diamong [38]3 years ago
8 0

Answer: -6 You answered your own question-

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Find the inverse of the matrix <img src="https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bcc%7D-4%266%5C%5C8%26-12%5C%5C%
liraira [26]

Answer:

D

Step-by-step explanation:

If there is a 2x2 matrix as  \left[\begin{array}{ccc}a&b\\c&d\\\end{array}\right]

The determinant is given by  \frac{1}{ad-bc}\left[\begin{array}{ccc}d&-b\\-c&a\\\end{array}\right]

<em>Now, if we calculate the value of "ad - bc", we see that:</em>

(-4)(-12)-(8)(6)=0

We can't calculate the inverse, the inverse doesn't exist. The answer is D.

4 0
3 years ago
Find the exact area of a circle having the given circumference.
blagie [28]

Answer:

<h2>A = 2.25π</h2>

Step-by-step explanation:

The formula of an area of a circle:

A=\pi r^2

r - radius

The formula of a circumference of a circle:

C=2\pi r

We have:

C=3\pi

Substitute:

2\pi r=3\pi            <em>divide both sides by 2π</em>

r=1.5

Substitute:

A=\pi(1.5)^2=2.25\pi

3 0
4 years ago
For every 15 campers at a summer camp there is 1 counselor.
katovenus [111]

Answer:

That would mean for every 30 campers there are 2 counselors and 45:3,60:4 and so on

Step-by-step explanation:

3 0
3 years ago
Hannah travels 6 times as many minutes to work as Raoul does. Together, they travel for 63 minutes. How many minutes does Hannah
Anna71 [15]
The equation would be 6x+x=63. Not sure how the models play out, but good luck
7 0
3 years ago
Do you need to ask a question, but don't have points.....
horsena [70]
Yes, felt that. thanks and have a lovely day!:D
8 0
2 years ago
Read 2 more answers
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