Question

I need help with these questions plz help

Answer 1

1.A=bh/2

2A=bh

2A/b=h

answer check

2.f(x)=21-6x f(5)=21-6(5)

g(x)=2x/5-11 f(5)=21-30

21-6x=2x/5-11 f(5)=-9

21=32x/5-11 g(5)=2(5)/5-11

(5)32=32x/5(5) g(5)= 10/5-11

160=32x g(5)=2-11

5=x g(5)=-9

3. f(7)=3(7)-7

f(7)= 21-7

f(7)= 14

Explanation: