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ziro4ka [17]
2 years ago
7

Help i am very confused on this.

Mathematics
1 answer:
pentagon [3]2 years ago
8 0

The  the output value of f(8) in the given function { f(x) = -3x² - 6x + 1 } is -239.

<h3>What is the output value of f(8) in the given function?</h3>

Given the function in the question;

  • f(x) = -3x² - 6x + 1
  • f(8) = ?

To determine the output value of f(8), we replace all occurrences of x with 8 in the function and simplify.

f(x) = -3x² - 6x + 1

f(8) = -3(8)² - 6(8) + 1

f(8) = -3(64) - 6(8) + 1

f(8) = -192 - 48 + 1

f(8) = -192 - 48 + 1

f(8) = -240 + 1

f(8) = -239

Therefore, the  the output value of f(8) in the given function { f(x) = -3x² - 6x + 1 } is -239.

Learn more about composite function here: brainly.com/question/20379727

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3 years ago
Solve for u. u+1/4=-4/5
DedPeter [7]

Answer:

u = (-21)/20

Step-by-step explanation:

Solve for u:

u + 1/4 = (-4)/5

Put each term in u + 1/4 over the common denominator 4: u + 1/4 = (4 u)/4 + 1/4:

(4 u)/4 + 1/4 = -4/5

(4 u)/4 + 1/4 = (4 u + 1)/4:

1/4 (4 u + 1) = -4/5

Multiply both sides of (4 u + 1)/4 = (-4)/5 by 4:

(4 (4 u + 1))/4 = (-4)/5×4

4×(-4)/5 = (4 (-4))/5:

(4 (4 u + 1))/4 = (-4×4)/5

(4 (4 u + 1))/4 = 4/4×(4 u + 1) = 4 u + 1:

4 u + 1 = (-4×4)/5

4 (-4) = -16:

4 u + 1 = (-16)/5

Subtract 1 from both sides:

4 u + (1 - 1) = (-16)/5 - 1

1 - 1 = 0:

4 u = (-16)/5 - 1

Put (-16)/5 - 1 over the common denominator 5. (-16)/5 - 1 = (-16)/5 - 5/5:

4 u = (-16)/5 - 5/5

-16/5 - 5/5 = (-16 - 5)/5:

4 u = (-16 - 5)/5

-16 - 5 = -21:

4 u = (-21)/5

Divide both sides by 4:

u = ((-21)/4)/5

5×4 = 20:

Answer:  u = (-21)/20

3 0
3 years ago
Ann thought of a number N, multiplied it by 5 and added 7. Then she told the result R to Jim. side note R=5n+7 using the previou
Neporo4naja [7]

Answer:

the answer is (R-7)÷5

Step-by-step explanation:

JNFZVZFN

5 0
3 years ago
X= 2 and y = 4, then -X-XY
Fed [463]

Answer:

-10

Step-by-step explanation:

= -X - XY

= -2 - 2×4

= -2 - 8

= -10

therefore, -X - XY = -10

5 0
3 years ago
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