Mathematics : asked on brandon1748

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

Mathematics, DAV Post Graduate College

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Mathematics

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

Step-by-step answer

P Answered by Master

$f(x) = 2x + 8 -- f(5) = 2(5) + 8 = 10 + 8 = 18\\\\f(x) = 3x +4 -- f(8) = 3(8) + 4 = 24 + 4 = 28$

Good day and hope that helps!

Mathematics

Find each function value. a. f(5) if f(x) = 3x + 4 b. f(-3) if f(x) = 2x - 8 c. f(7) if f(x) = 9x - 24

Step-by-step answer

P Answered by PhD

1

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

Find each function value. a. f(5) if f(x) = 3x + 4 b. f(-3) if f(x) = 2x - 8 c. f(7) if f(x) = 9x - 24

Step-by-step answer

P Answered by PhD

1

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

Given f(x) = 2x² + 8x – 4 and g(x) = -5x + 6, find (f – g)(x) or f(x) – g(x) a. 7x² + 8x – 10 b. 2x² + 13x – 10 c. 2x² + 3x + 2 d. 2x² - 6x +10 2. given f(x) = 3x – 5 and g(x) = x + 2, find f(x) * g(x) or (f*g)(x) a. 4x - 3 b. 4x² - 3x - 10 c. 3x² + x - 10 d. 3x² - x + 10 3. given f(x) = x³ and g(x) = 4x + 3, find g(f(3)) a. 108 b. 405 c. 3,375 d. 111 4. given f(x) = 3x – 9 and g(x) = x – 4 what is the value of g(f( a. 2 b. 6 c. 9 d. -4 5. which expression is equal to f(x) + g(x) given f(x) = x² + 10 and g(x) = x – 3 ? a. 2x² + 7 b. 7x² + x - 3

Step-by-step answer

P Answered by PhD

wow!

those are a lot of questions!

Mathematics

Given f(x) = 2x² + 8x – 4 and g(x) = -5x + 6, find (f – g)(x) or f(x) – g(x) a. 7x² + 8x – 10 b. 2x² + 13x – 10 c. 2x² + 3x + 2 d. 2x² - 6x +10 2. given f(x) = 3x – 5 and g(x) = x + 2, find f(x) * g(x) or (f*g)(x) a. 4x - 3 b. 4x² - 3x - 10 c. 3x² + x - 10 d. 3x² - x + 10 3. given f(x) = x³ and g(x) = 4x + 3, find g(f(3)) a. 108 b. 405 c. 3,375 d. 111 4. given f(x) = 3x – 9 and g(x) = x – 4 what is the value of g(f( a. 2 b. 6 c. 9 d. -4 5. which expression is equal to f(x) + g(x) given f(x) = x² + 10 and g(x) = x – 3 ? a. 2x² + 7 b. 7x² + x - 3

Step-by-step answer

P Answered by PhD

wow!

those are a lot of questions!

Mathematics

For the functions f(x) = 2x + 4 and g(x) = 3x + 1, find g(f(5)) a.7 b.8 c.18 d.25

Step-by-step answer

P Answered by PhD

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

For the functions f(x) = 2x + 4 and g(x) = 3x + 1, find g(f(5)) a.7 b.8 c.18 d.25

Step-by-step answer

P Answered by PhD

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

Imran is paid ?286 per week Every week he puts 20% of his wage into a savings account How much does he put into his savings each week

Step-by-step answer

P Answered by PhD

The answer is in the image

The answer is in the image

Mathematics

You can buy jars of the same jam in 2 sizes large jar:440g for £1.54 small jar:340g for £1.26 By considering the price per gram, work out which jar is the best value for money. Working must be shown

Step-by-step answer

P Answered by PhD

Answer: 440 grams for 1.54 is the better value
Explanation:
Take the price and divide by the number of grams
1.54 / 440 =0.0035 per gram
1.26 / 340 =0.003705882 per gram
0.0035 per gram < 0.003705882 per gram

Mathematics

The last time Robert filled up his car with gas, he paid $24.50 for 7 gallons. This time, he needs 15 gallons. If the price is the same, how much will he pay?

Step-by-step answer

P Answered by PhD

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

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