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Nadusha1986 [10]
3 years ago
12

6 7 8 only 8th grade math

Mathematics
1 answer:
saul85 [17]3 years ago
8 0

☺ I might have misunderstood, but I can help if you give me the question. ☺

     

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Will give brainliest !!
lesya692 [45]

Answer:

[B]=2

Step-by-step explanation:

B=\left[\begin{array}{ccc}3x-5&-3+2y\\11-3x&2y-5\end{array}\right]

With x=3 and y=4

B=\left[\begin{array}{ccc}3(3)-5&-3+2(4)\\11-3(3)&2(4)-5\end{array}\right]

B=\left[\begin{array}{ccc}9-5&-3+8\\11-9&8-5\end{array}\right]

B=\left[\begin{array}{ccc}4&5\\2&3\end{array}\right]

solving the determinant of matrix B

[B]=\left[\begin{array}{ccc}4&5\\2&3\end{array}\right]=(4.3-5.2)=(12-10)=2

8 0
3 years ago
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Solve the equation (Picture provided)
USPshnik [31]

<u>Answer:</u>

The correct answer option is D. 120°, 240°.

<u>Step-by-step explanation:</u>

We are given the information about x that cos x=-\frac{1}{2}.

We know that [tex]cos x=-\frac{1}{2}[/tex ] is actually the ratio of adjacent side to the hypotenuse. It means that here, adjacent is -1 and hypotenuse is 2.

A negative cosine tells us that the angle is either in Quadrant II or Quadrant III.

So if it is in 2nd quadrant, then x = 120° and if its in 3rd quadrant then x = 240°.

6 0
3 years ago
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Calculate the simple interest on $4,000,000 at 5% per annum for 2 years.
Dmitry_Shevchenko [17]

Answer:

400,000

Step-by-step explanation:

In total, you would be paying 400,000 for 2 years for the interest.

So, for one year, the interest would be 200,000. The monthly rate would be 16,666.6667.

3 0
2 years ago
PLEASE HELP ASAP I have no idea how to solve this pls pls pls
xz_007 [3.2K]

Answer:

Step-by-step explanation:

you have to use trigonometric functions

cos 30 = adj. /hyp.

cos 30 = 12 / y

y = 12/cos 30 ≅13.86

tan 30 = opp./adj

tan30 = x / 12

x = 12 tan30 ≅6.93

5 0
3 years ago
50 POINTS &amp; BRAINLIEST TO THE QUICKEST PERSON
Juliette [100K]

Vertical lines: lines that run up and down.  If you are standing up then you are vertical.  On a graph the x-axis has little marks that run up and down or "vertical."  Since the x-axis has lines that run vertical then if you have a point use you x-ordinate (x number).   Therefore; in the point (4, -3), your vertical line is x = 4.

In the point (2, 10), can you determine the vertical line ...

Which is x=2

For vertical line just take the other number and write y =.

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3 years ago
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