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klasskru [66]
3 years ago
9

Its asking to solve for y and the rest​

Mathematics
1 answer:
gladu [14]3 years ago
3 0
First you have to find the missing y
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Brainly use a matrix to find the solution to the system of equations -8x-8y=-16 6x-9y=-108
Mama L [17]
We want to use a matrix to solve
-8x - 8y = -16
6x - 9y = -108

Before solving, simplify the equations as follows:
Divide the first equation by -8 to obtain
x + y = 2             (1)
Divide the second equation by 3 to obtain
2x - 3y = -36       (2)

In matrix form, the equations are
\begin{bmatrix}1&1\\2&-3\end{bmatrix} \begin{\bmatrix} x\\y\end{bmatrix}=\begin{bmatrix}2 \\ -36 \end{bmatrix}

The determinant of the matrix is
D = (1)(-3) - (1)(2) = -5

Use Cramer's Rule.
x =  \frac{1}{D} det(\begin{bmatrix}2&1\\-36&-3 \end{bmatrix} ) =  \frac{1}{-5} (-6+36) = -6
Similalrly, 
y= \frac{1}{-5} det(\begin{bmatrix} 1&2\\2&-36\end{bmatrix} ) = \frac{1}{-5}(-36-4) =8

Answer:  (-6, 8)  or x = -6, y = 8


8 0
3 years ago
Aldo made $153 for 9 hours of work<br> At the same rate how much would he make for 18 hours of work?
juin [17]

Answer:

306

Step-by-step explanation:

153 divided by 9

17 times 18

If you can please put brainiest

8 0
3 years ago
Read 2 more answers
Four gallons of paint are used to paint 25 chairs. If each chair used the same amount of paint, how many gallons are used to pai
ella [17]
You have to do 25 divided by 4, which is 6.35.
5 0
3 years ago
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-8 ( r + 6 ) = 7 ( r + 6 ) <br> solve the equation
tangare [24]


r=-6  

You have to use distributive property and multiply parentheses

5 0
2 years ago
What is the sum?
RSB [31]
It is C) 2.55 because i was taught that you can subtract the negative from the positive. 5.35-2.8=2.55 and it is positive
5 0
3 years ago
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