The first two rows of coefficients are identical, so by inspection, the determinant is 0.
Answer:
Reflection
Step-by-step explanation:
Answer:
Part A: 55
Step-by-step explanation:
The measure of angle x is 55 I found this by finding angle BPR.
Then I found that we start with 180 - 120 and that equals 60. That means that angle BPR is 60 degrees. Then we need to do 65 + 60 + x =180. To find the x we do 65 + 60 and that gives us 125. After simplifying that from simple algebra we get x=55
Answer:
<h3>
x = -5, y = 7</h3>
Step-by-step explanation:
-3x + y = 22 ⇒ y = 3x + 22
-12x - 10y = -10 and y = 3x + 22
-12x - 10(3x + 22) = -10
-12x - 30x - 220 = -10
+220 +220
- 42x = 210
÷(-42) ÷(-42)
x = -5
y = 3(-5) + 22 = -15 + 22 = 7