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KIM [24]
3 years ago
6

If the following system of equations was written as a matrix equation in the form AX = C, and matrix A was expressed in the form

[a c b d] , find the value of a - b + c + d.
5x + 7y = 7
3x - 2y = 9

My main problem is understanding which numbers are a, b, c, and d.

Mathematics
1 answer:
FrozenT [24]3 years ago
6 0
That's what I came up with. Still not sure of my answer. 

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WILL MARK BRAINLIEST!!!!!!!!!!!!!!!!!!! (image attatched)
alexgriva [62]
The answer would be the first one
4 0
3 years ago
Please someone help me and explain this question to me (the last question starting with a straw)
Anastasy [175]

Each straw is  4-1/8 inches long.
You have one gigantic piece of straw material, 123-3/4 inches long.
How many straws can you cut it up to make ?

 ===>                    (123-3/4)  divided by  (4-1/8)            straws.

Each one costs  $0.015  to make.
So, once you find the number of short straws you have,
multiply

===>                 (the number of short straws) x ($0.015) .

That'll tell you how much it costs to make all of them. 


Now you know how to do it on your own.
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6 0
3 years ago
Help me please I need help?
liubo4ka [24]
I think it is D

I am not sure but this is what I think it is
4 0
3 years ago
Read 2 more answers
It costs $3 to bowl a game and $2 for shoe rental. a. Write an expression for the total cost (in dollars) of $g$ games. Expressi
Semmy [17]

Answer: a. Total cost = 3g+2

b. The total cost of 8 games is $26.

Step-by-step explanation:

Given: Cost to bowl a game = $3

Shoe rental charge = $2  (One -time charge)

Total cost = (Cost to bowl a game) x (Number of games)+ (Shoe rental charge )

Let g= number of games, then the expression to find the total cost will be :

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To find the total cost of 8 games, put g=8, we get

Total cost = 3(8)+2

= 24+2 = $26

Therefore , the total cost of 8 games is $26.

7 0
3 years ago
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vitfil [10]
So anytime we have a slope and want to find the slope of a perpendicular line, we just have to remember a perpendicular line's slope is the negative reciprocal (reciprocal means flip the fraction). So if we had a slope of 3/4, the slope perpendicular to it would be - 4/3.


First we need to find our slope, to do this we take the change in y over the change in x like so:

(15-12)/(4-7) = - 3/4

The slope perpendicular to this is 4/3.
3 0
3 years ago
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