tolong bantu kak ya kak

4) h(x)= -5-4x

a. h(-2)= -5-4(-2)
= -5+8 = 3
h(1)= -5-4(1)
= -5-4= -9
h(2)= -5-4(2)
= -5-8= -13


b. k sama saja dengan x, jadi
h(k)= -25
h(k)= -5-4x= -25
-4x= -25+5
-4x= -20. x= 5 atau k=5



5) f(x)= 10-4x
a. f(-2)= 10-4(-2)
= 10+8= 18
f(0)= 10-4(0)
= 10-0= 0
f(2)= 10-4(2)
= 10-8= 2
f(4)= 10-4(4)
= 10-16= -6

b. y sama saja dengan x, jadi
f(y)= 10-4x=14
-4x=14-10
-4x= 4. x= -1 atau y= -1

c. m sama saja dengan x, jadi
f(m)= 10-4x= -10
-4x= -10-10
-4x= -20. x=5 atau m=5

4.fungsi h(x) = -5 -4x
a. nilai dari :
h(-2) =-5 -4(-2)
= -5 +8
= 3
h(-1)= -5 -4(-1)
= -5 +4
= -1
h(1)= -5-4(1)
= -5-4
= -9
h(2)= -5 -4(2)
= -5 -8
= - 13
b. nilai k ---->h(k) = -25
-5 -4k = -25
-4k = -25 +5
k = -20/-4
k= 5
5.fungsi f(x) = 10 - 4x
a.bayangan dari:
f(-2)= 10-4(-2)= 10 +8 = 18
f(0)= 10-4(0) = 10-0=10
f(2)= 10-4(2)= 10-8=2
f(4)= 10-4(4)= 10-16= -6
bayangannya adalah: (-2,18),(0,10),(2,2),(4,-6)

b.y--->f(y)=14
10 -4y =14
-4y = 14-10
y = 4/-4= -1

c.m---->f(m)=-10
10-4m = -10
-4m = -10 -10
m = -20/-4= 5

maaf kalau salah.