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Triss [41]
3 years ago
15

Heklp me again please if you dont mind

Mathematics
1 answer:
matrenka [14]3 years ago
4 0

Step-by-step explanation:

This is the answer of this question.

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Help! I'm a little stumped when it comes to variables in matrices. An explanation would be super rad!
iris [78.8K]

Answer:

30

Step-by-step explanation:

To find the determinant of a 3x3 matrix, you can use this method. (See picture.)

Start with the first number in the top row, and block off the row and column.  A 2x2 matrix will be left.  Find the determinant of this 2x2 matrix, and multiply it by the number in the top row.

Repeat for the other two numbers in the top row.  Add the first result, subtract the second, and add the third.

det A = -2 [(3)(-5) − (a)(0)] − 2 [(0)(-5) − (a)(0)] + b [(0)(0) − (3)(0)]

det A = -2 (3)(-5) − 0 + 0

det A = 30

8 0
3 years ago
T(8,2) is reflected across the x-axis.
skad [1K]

✧・゚: *✧・゚:*    *:・゚✧*:・゚✧

                  Hello!

✧・゚: *✧・゚:*    *:・゚✧*:・゚✧

❖ T (8, 2) reflected across the x-axis is (8, -2). When you reflect over the x-axis, the sign in front of the y coordinate changes. When you reflect over the y-axis, the sign in front of the x coordinate changes.

~ ʜᴏᴘᴇ ᴛʜɪꜱ ʜᴇʟᴘꜱ! :) ♡

~ ᴄʟᴏᴜᴛᴀɴꜱᴡᴇʀꜱ

6 0
3 years ago
the diagram below has a cake is divided at a cake sale, if all the slices are sold at a total of $2500 would be collected. how m
Anarel [89]

Answer:

I am pretty sure $750

Step-by-step explanation:

Since there are 10 slices of cake, you would have to divded the cost ($2,500) by 10 to find out the cost per slice (you would get $250). Since we are finding the cost of 3 slices, you would mulitply 250 by 3, then you get your answer

4 0
3 years ago
Factor completely: x^2 - 5x - 6
Tom [10]

Answer:

x×x-5x-6

x × -4X - 6

Step-by-step explanation:

x×x-5x-6

x × -4X - 6

6 0
3 years ago
Use the model to solve for x
laila [671]

Answer:

A) no solution

Step-by-step explanation:

<em>1. X + 1 and X -1 -1 do </em><em>not equal</em>

<em>2. This </em><em>equation does not provide enough facts</em><em> to be able to solve this</em>

<em>3. It is a </em><em>trick question</em><em> </em><em>don't fall for it</em>

<em></em>

<em>Have a nice day!</em>

5 0
3 years ago
Read 2 more answers
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