Answer:
x = -9, y = -3.
As an ordered pair it is (-9, -3).
Step-by-step explanation:
Substitute x = 3y in equation 1:
2y + 3y = -15
5y = -15
y = -15/5
y = -3.
Now find x by plugging y = -3 in x = 3y:
x = 3*-3 = -9.
Check the answer in equation 1:
2(-3) + -9
= -6 - 9
= -15 Correct.
The value of a₃₂ is 7 , Option A is the correct answer.
<h3>What is a Matrix ?</h3>
Matrix is an array or an arrangement of numbers or expression in rows and column format.
The matrix is given
For a matrix of size mxn , m is the row and n is the column of the matrix.
a₃₂ = This term means 3rd row and 2nd column of the matrix
which is 7
Therefore the value of a₃₂ is 7 , Option A is the correct answer.
To know more about Matrix
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The value of f(x) is 13, when x = 10
<h3>What are functions?</h3>
Functions are used to represent equations, graphs and ordered pairs
The equation of the function is given as:
When x =10, the equation becomes
Divide 10 by 2
Add 5 and 8
Hence, f(x) is 13, when x = 10
Read more about functions at:
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-(1/4 w + 8) + 8 = 3
-1/4 w - 8 = 3 - 8 = -5
1/4w = -8 + 5 = -3
w = 4 x -3 = -12
w = -12