01.09.2021

# If f(x)=2x+8, find f(5).and if f(x)=3x+4, find f(8)

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09.07.2023, solved by verified expert

Good day and hope that helps!

### Faq

Mathematics

Good day and hope that helps!

Mathematics
A)  f(5) = 3(5) + 4 = 19
b) f(-3) = 2(-3) - 8 = -14
c)  f(7) = 9(7) - 24 = 39

Substitute 5, -3, and 7 for x.
Mathematics
A)  f(5) = 3(5) + 4 = 19
b) f(-3) = 2(-3) - 8 = -14
c)  f(7) = 9(7) - 24 = 39

Substitute 5, -3, and 7 for x.
Mathematics

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

Mathematics

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

Mathematics

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

Mathematics

The solution is in the following image

Mathematics

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.

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