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3 years ago

What is the value of

Mathematics

2 answers:

3241004551 [841]3 years ago

8 0

Answer:

Step-by-step explanation:

(f• g)(x) = f(x) × g(x)

= $2^{x}$ × (2x - 5)

To evaluate (f • g)(3) , substitute x = 3 into the expression

= 2³ × ( 2(3) - 5)

= 8 × (6 - 5)

= 8 × 1

= 8

Alexxandr [17]3 years ago

6 0

Answer:

The answer is 2.

Step-by-step explanation:

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Propane has a heat energy of 2,470 BTU/ft cubed. How much energy can a propane tank with a volume of 43.7 ft cubed produce?

professor190 [17]

Answer: $107939\ BTU$

Step-by-step explanation:

Given

Propane produced heat energy of $2470\ BTU/ft^3$

The volume of the tank is $43.7\ ft^3$

The energy produced by this propane tank is

$\Rightarrow 2470\times 43.7=107939\ BTU$

4 0

2 years ago

Simplify (-x^2 – 28x + 7) + (-7x^2 + 14x + 8).

Anon25 [30]

Add numbers with the same amount of variables

-x^2 + (-7x^2) = -8x^2

– 28x (+ 14x )= -14x

7 (+ 8) = 15

-18x² - 14x + 15 is your answer

hope this helps

6 0

3 years ago

Help me please help help help help

sineoko [7]

Answer:

Step-by-step explanation:

it is the same angle from one side and theother

3 0

2 years ago

Read 2 more answers

Question is in the picture and answer

dmitriy555 [2]

Answer:

The correct answer is D) y + 1 = -2(x - 5)

Step-by-step explanation:

All equations can be written in the following point-slope form.

y - y1 = m(x - x1)

In which, m is the slope. (x1, y1) is the given point. If we use the information given we can find the equation.

y - - 1 = -2(x - 5)

y + 1 = -2(x - 5)

8 0

3 years ago

Find the critical numbers sin^2x+cosx 0 < x< 2pi

ryzh [129]

$\bf sin^2(x)+cos(x)\iff [sin(x)]^2+cos(x)\\\\
-----------------------------\\\\
\cfrac{dy}{dx}=2sin(x)cos(x)-sin(x)\implies 0=2sin(x)cos(x)-sin(x)
\\\\\\
0=sin(x)[2cos(x)-1]\implies 
\begin{cases}
0=sin(x)\\
sin^{-1}(0)=\measuredangle x\\
\pi \\
----------\\
0=2cos(x)-1\\\\ \frac{1}{2}=cos(x)\\\\ cos^{-1}\left( \frac{1}{2} \right)=\measuredangle x\\\\ \frac{\pi }{3},\frac{5\pi }{3}
\end{cases}$

5 0

3 years ago