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Ksju [112]
4 years ago
14

Evaluate the expression below when x = -2. x^2 − 8 / x + 6

Mathematics
1 answer:
Bas_tet [7]4 years ago
6 0

Answer:

14

Step-by-step explanation:

Substitute -2 for x in the two places where x occurs:

              8

(-2)^2 - ------- + 6    =    4 + 4 + 6  =  14

              -2

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If f(x)=4x+3 and g(x)=x^2-3 then f(g(2))
grandymaker [24]

Answer:

<em>f(g(2))=7</em>

Step-by-step explanation:

<u>The Composite Function</u>

Given f(x) and g(x) as real functions, the composite function (f\circ g)(x) is defined as:

(f\circ g)(x)=f(g(x))

It can be found by substituting g into f.

The given functions are:

f(x)=4x+3

g(x)=x^2-3

It's required to find f( g( 2 ) )

Find g(2):

g(2)=2^2-3

Operating:

g(2)=4-3 =1

g(2)=1

Now find f(1):

f(1)=4(1)+3

f(1)=4+3 =7

Thus:

f( g( 2 ) )=7

4 0
3 years ago
Ms. Li spent $840 on a vacation. She spent 2/3 of the amount on a plane ticket and 1/2 of the remaining amount on food. How much
olya-2409 [2.1K]
\bf 840\cdot \cfrac{2}{3}\impliedby \textit{on the plane ticket}&#10;\\\\\\&#10;\left( 840\cdot \cfrac{2}{3} \right)\cdot \cfrac{1}{2}\impliedby \textit{ on food}
4 0
3 years ago
Select all the numbers that belong to the special sequence of square numbers.
ipn [44]

answer:

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81 =9²

169=13²

7 0
3 years ago
If there are 19 questions and each question has 4 answers, what is the probability she will answer at least one question correct
gregori [183]

Answer:

0.9958

Step-by-step explanation:

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Hence, p = 0.25

n = 19

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Using the binomial probability formula :

P(x =x) = nCx * p^x * (1 - p)^(n - x)

However, to save computation time, we could use a calculator :

Using a calculator,

P(x ≥ 1) = 0.99577

P(x ≥ 1) = 0.9958

7 0
3 years ago
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jeka57 [31]

Step-by-step explanation:

I believe the answer is 80 cuz it's in the middle

7 0
3 years ago
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