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Olenka [21]
4 years ago
8

F(x)=-x^2+6x+19 find f(5)

Mathematics
1 answer:
Andrej [43]4 years ago
7 0

Answer:

f(5) = 24

Step-by-step explanation:

Step 1: Define

f(x) = -x² + 6x + 19

f(5) = x = 5

Step 2: Substitute

f(5) = -(5)² + 6(5) + 19

Step 3: Evaluate

f(5) = -25 + 30 + 19

f(5) = 5 + 19

f(5) = 24

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3 years ago
What is the value of x in the equation 2 x + 3y equals 36 when y equals 6​
satela [25.4K]

Answer: x=9

Step-by-step explanation:

(9x2)+(3x6)=36

18+18=36

8 0
3 years ago
Read 2 more answers
What's the standard equation of the circle with the general equation x2 + y2 + 4x – 2y – 20 = 0? answers: 1) (x + 2)2 + (y – 1)2
gizmo_the_mogwai [7]

Answer:

4).  (x + 2)^2 + (y - 1)^2 = 25.

Step-by-step explanation:

x^2 + y^2 + 4x - 2y - 20 = 0

x^2 + 4x + y^2 - 2y = 20

Completing the square on the x and y terms:

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(x + 2)^2 + (y - 1)^2 = 20 + 4 + 1

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3 0
3 years ago
Simplify. 3√-28 <br><br> A 2i√7<br> B 12i√7<br> C 61√7<br> D -6i√7
netineya [11]

Answer:

C

Step-by-step explanation:

We want to simplify the expression:

\displaystyle 3 \sqrt{-28}

Rewrite:

\displaystyle = 3 \sqrt{ 4\cdot 7 \cdot -1}

Rewrite:

\displaystyle = 3 \cdot \sqrt{4} \cdot \sqrt{7} \cdot \sqrt{-1}

Simplify. Let <em>i</em> = √(-1). Hence:

\displaystyle = 3 \cdot \left(2\right) \cdot \left(i\right) \cdot \sqrt{7}

Multiply:

\displaystyle = 6i\sqrt{7}

In conclusion, our answer is C.

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3 years ago
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True
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3 years ago
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