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pshichka [43]
3 years ago
11

Expand(2x-1)(x+5) please answer this ASAP thank you.

Mathematics
1 answer:
hjlf3 years ago
4 0

Answer:

2x² + 9x - 5

Step-by-step explanation:

Given

(2x - 1)(x + 5)

Each term in the second factor is multiplied by each term in the first factor, that is

2x(x + 5) - 1(x + 5) ← distribute both parenthesis

= 2x² + 10x - x - 5 ← collect like terms

= 2x² + 9x - 5

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Find the price-demand equation for a particular brand television when the demand is 20 TVs per week at $150 per TV, given that t
Alina [70]

Answer:

~150=50e^{-0.01()20}

~p(100)=\$127.7

Step-by-step explanation:

From the question we are told that:

Price of 20TVs per week P_{20}=\$150

Marginal price-demand function p'(x)=-0.5e-0.01x

Generally the The Marginal price function is mathematically given by

  p'(x)=-0.5e^{-0.01x}  

  p(x)=\int-0.5e^{-0.01x}  

  p(x)=50e^{-0.001x}+C  

Therefore the equation when the demand is 20 TVs per week at $150 per TV

150=50e^{-0.01()20}

Giving

p(x)=50e^{-0.01x}+150-50e^{-0.01(20)}

Therefore the Price when the demand is 100 TVs per week

p(100)=50e^{-0.01(100)}+150-50e^{-0.01(20)}

p(100)=\$127.7

7 0
2 years ago
Help please fast is important
vazorg [7]

Answer:

can't see

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Emanuel has 745 pictures in his phone.His memory is getting full, so he starts deleting 20 pictures every day. Define each varia
BigorU [14]
Let f be the function with variable n, which gives the number of pictures left in the phone after deleting pictures for n-days.

So f(1) gives the number of photos left after 1 day of deleting photos

     f(2) gives the number of photos left after 2 days of deleting photos

     and so on.

f(1)=745-20
f(2)=745-20-20=745-20*2
f(3)=745-20-20-20=745-20*3

so clearly f(n)=745-20n

Answer:

the algebraic expression is f(n)=745-20n, 

where n is the n'th day of deleting photos, and f is the number of photos left after n days of deleting.
7 0
3 years ago
5/2x - 1.5 = 3.5 what is the value of x
azamat

Answer:

2

Step-by-step explanation:

<em>Add 1.5 to both sides:</em>

5/2x-1.5+1.5=3.5+1.5

5/2x=5

<em>Multiply both sides by 2/5</em>

(2/5)*(5/2x)=(2/5)*(5)

8 0
3 years ago
Write the formula of the area of a circle
Lunna [17]

A = π × r2

Hope this helped!

-<em>Akito </em>

3 0
2 years ago
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