tolong dijawab ...makasih

22.
32 orang = S
16 orang= IPA
17 orang= IPS
5 orang = keduanya

IPA saja = 16 - 5 = 11 orang
IPS saja = 17 - 5 = 12 orang

11 + 12 + 5 = 28 orang
32 - 28 = 4 orang

4 orang tidak suka keduanya (A)

23.
f(x) = 3 - 7x
f(5 - m) = 3 - 7(5 - m)
f(5 - m) = 3 - 35 + 7m
f(5 - m) = 7m - 32 (B)

24.
f(x) = ax + b

f(1) = a + b
f(3) = 3a + b
__________ -
-2a = -12
a = 6

3a + b = 7
3.6 + b = 7
18 + b =17
b = -11

f(x) = ax + b
f(4) = ax + b
f(4) = 6.4 - 11
f(4) = 13 (A)

25.
k + a = 30 (.2)
4k + 2a = 84 (.1)
_____________-
-2k = -24
k = 12 × 3000 = 36000
a = 30 - 12 = 18 × 1000 = 18000

36000 + 18000 = 54000 (D)