No 1-5 tolong kasih tau jawaban sama penjelasannya. Tolonggggg yaaaaa!

1) 4A + B = 6.000 |x2| 8A + 2B = 12.000
........................................ 5A + 2B = 9.000
-------------------------------------------------------- --
......................................... 3A = 3.000 => A = 1.000
4A + B = 6.000 => 4(1.000) + B = 6.000 => B = 2.000
11A + 16B = 11(1.000) + 16(2.000) = 11.000 + 32.000 = 43.000

2) y = 8x + 4, y = x^2 + 6x + 5
y = y
x^2 + 6x + 5 = 8x + 4
x^2 - 2x + 1 = 0
(x - 1)(x - 1) = 0
x = 1
y = 8x + 4 => y = 8(1) + 4 => y = 12
HP = {(1, 12)}

3) (2 ... x) (y ... 0) = (8 ... x)
.... (-1 .. 2) (2 ... 1) ... (6 .. 2)

(2y + 2x ... 0 + x) = (8 ... x)
(-y + 4 ...... 0 + 2) ... (6 .. 2)

-y + 4 = 6 => -y = 2 => y = -2

2y + 2x = 8
2(-2) + 2x = 8
2x = 12
x = 6
x - y = 6 - (-2) = 8

4) (xp,yp) = (5, 2) dan (x, y) = (3, 6)
y = a(x - xp)^2 + yp
6 = a(3 - 5)^2 + 2
6 - 2 = a(-2)^2
4 = 4a
a = 1
y = a(x - xp)^2 + yp
y = 1(x - 5)^2 + 2
y = x^2 - 10x + 27
f(x) = x^2 - 10x + 27

5) tinggi pemburu = 150 cm = 1,5 m
Tinggi pohon = 11,5 m
Sisi depan (de) = 11,5 - 1,5 = 10
Jarak pemburu dan pohon = sisi samping = sa = x ?????
Tan 30° = de/sa
√3/3 = 10/x
√3 x = 30
x = 30/√3 . √3/√3 = (30√3)/3 = 10√3 m