All you have to do is insert the x and y value's, then solve.
x = -3
y = -7
(3(-3) - 2(-7)) (-3(-3) + 4(-7))
(-9 + 14) (9 + -28) (Two negatives make a positive.)
(5)(-19)
= -95
Hope this helps you! Happy thanksgiving, here's a turkey!
The missing value is 12 in a system of equations with infinitely many solutions conditions.
It is given that in the system of equations there are two equations given:
![\rm y =n -2x+4\\\rm and \\\rm 6x+3y= ?](https://tex.z-dn.net/?f=%5Crm%20y%20%3Dn%20-2x%2B4%5C%5C%5Crm%20and%20%5C%5C%5Crm%206x%2B3y%3D%20%3F)
It is required to find the missing value in the second equation.
<h3>What is a linear equation?</h3>
It is defined as the relation between two variables if we plot the graph of the linear equation we will get a straight line.
We have equations:
![\rm y = -2x+4 ....(1)\\ \\\rm 6x+3y= ? ....(2)](https://tex.z-dn.net/?f=%5Crm%20y%20%3D%20-2x%2B4%20....%281%29%5C%5C%20%20%5C%5C%5Crm%206x%2B3y%3D%20%3F%20%20....%282%29)
Let's suppose the missing value is 'Z'
We know that the two pairs of equations have infinitely many solutions if and if they have the same coefficients of variables and the same constant on both sides.
From equation (1)
(multiply both the sides by 3)
...(3)
By comparing the equation (2) and (3), we get
M = 12
Thus, the missing value is 12 in a system of equations with infinitely many solutions conditions.
Learn more about the linear equation.
brainly.com/question/11897796
Answer:
<em>A) The reference angle should be </em><u><em>
,</em></u><em> and the sign of the value should be </em><u><em>negative.</em></u>
Step-by-step explanation:
cos(
)
Remove full rotations of 2π until the angle is between 0 and 2
.
cos(
)
Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because cosine is negative in the third quadrant.
-cos(
)
The exact value of cos(
) is
.
−