Good day and hope that helps!

wow!

those are a lot of questions!

43

Step-by-step explanation:

f(x) = 2x + 4 and g(x) = 3x + 1,

find g(f(5))

f(5) = 2x+4 where x=5

=2(5) +4

= 10+4

= 14

f(5) =14

The substitute x=14 into g(x)

g(x) = 3x+1

g(15) = 3(14) +1

=42+1

=43

Cost of 7 gallons=$24.50

Cost of 1 gallon=24.50/7=3.5

Cost of 15 gallons=15*3.5=52.5

Cost of 15 gallons will be $52.5

The solution is in the following image

The wood before starting =12 feet

Left wood=6 feet

Wood used till now=12-6=6 feet

Picture frame built till now= 6/(3/4)

=8 pieces

Therefore, till now 8 pieces have been made.

It will provide an instant answer!