Answer:
A. 19.5
Step-by-step explanation:
Diagonals of a rhombus intersect at right angles. Therefore the angle opposite to AD = 90°.
Thus:
90° + x + 3x + 12 = 180° (sum of ∆)
Add like terms
102 + 4x = 180
Subtract 102 from each side
4x = 180 - 102
4x = 78
Subdue both sides by 4
x = 19.5
Answer:
y=-3x+5
bring (4,-7) in other three lines
you will know that it is unreasonable that
-7=-14
-7=-17
-7=14
Answer:
$27.25
Step-by-step explanation:
$30.00 - $2.75= $27.25
The solution to the system of equation is (-1/3, 2)
<h3>System of equation</h3>
Given the system of equation below;
y = 6x+4
9x+y = -1
Substitute equation 1 into 2 to have:
9x + 6x + 4 = -1
15x + 4 = -1
15x = -5
x = -5/15
x = -1/3
Substitute x = -1/3 into equation 1 to have:
y = 6(-1/3) + 4
y = -2 + 4
y = 2
Hence the solution to the system of equation is (-1/3, 2)
Learn more on system of equation here: brainly.com/question/14323743
#SPJ1
