tolong ya !! no 19 - 22, dengan caranya
Matematika
ica836
Pertanyaan
tolong ya !! no 19 - 22, dengan caranya
1 Jawaban
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1. Jawaban muhakbardzp51yw5
19.) x-3y+2 = 0
-3y = -x-2
y = 1/3x + 2/3
maka M = 1/3
y - y1 = m(x-x1)
y - 5 = 1/3(x-(-2))
y - 5 = 1/3(x+2)
y - 5 = 1/3x + 2/3
y = 1/3x + 2/3 + 5
------------------------- x 3
3y = x + 2 + 15
-17 = x - 3y atau x - 3y = -17 (B)
20.) 5x - 3y = 7 |x1| 5x - 3y = 7
2x + y = 5 |x3| 6x + 3y = 15
------------------- (+)
11x = 22
x = 2
2x + y = 5
2(2) + y = 5
4 + y = 5
y = 5 - 4 = 1
3x - 4y = 3(2) - 4(1)
= 6 - 4
= 2 (C)
21.) D
22.) a = 5 ( 180 - a )
a = 900 - 5a
a + 5a = 900
6a = 900
a = 150 (A)
semoga membantu, maaf apabila salah