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2 years ago

Will give BRAINEST to the person who answers right

2 answers:

6 0

R(x)=15x
c(x)=7x+20

So it is r(x)-c(x)
15x-(7x+20)

Distribute the minus sign making the new equations
15x-7x-20
COMBINE LIKE TERMS
Answer is:
8x-20 which is C

Nookie1986 [14]2 years ago

3 0

The answer of this question is B. 22x + 20

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4. What is the acceleration of a plane that changes velocity from 75 m/s to

kompoz [17]

Answer:

$a = \frac{v - u}{t} \\ s = \frac{ {v}^{2} - {u}^{2} }{2a}$

Explanation:

Apply SUVAT

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2 years ago

If the same fish is attached to the end of the unstretched spring and then allowed to fall from rest, through what maximum dista

andrew11 [14]

Answer:

x=2d

Explanation:

initial stretch in the spring is d

so using Hook's law

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d=mg/k ................ (1)

in second case by energy conservation

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2 years ago

Mars completes one orbit around the Sun in approximately two Earth years. Mars orbits at an average distance to the Sun of about

satela [25.4K]

Answer:

about 0.8 times

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The orbital Speed of Mar is 0.8*29.78kilometers per second/1

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2 years ago

What is one way in which objects transfer <br> momentum? Explain.

defon

Through vibration when it vibrates
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2 years ago

Read 2 more answers

A laser shines violet light with a frequency of 703 thz onto the metal with a threshold frequency of 295 thz, what is the kineti

hram777 [196]

The kinetic energy of the ejected electrons will be 2782.5 ×10⁻²² eV.

<h3>What is threshold frequency?</h3>

The threshold frequency of incoming radiation is the lowest frequency at which photoelectric emission or electron emission is impossible.

The threshold frequency is the light frequency that causes an electron to dislodge and emit from the metal's surface.

From the photoelectric effect, the equation obtained as;

$\rm hv=hv_0+KE\\\\ KE=h(v-v_0)\\\\ KE=6.625 \times 10^{-34}(702-282)Hz \\\\ KE= 6.625 \times 10^{-34}\times 420 \times 10^{12} \ Hz \\\\ KE=2782 .5 \times 10^{-22} \ eV$

Hence,the kinetic energy of the ejected electrons will be 2782.5 ×10⁻²² eV.

To learn more about the threshold frequency, refer to the link;

brainly.com/question/2499414

#SPJ1

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1 year ago