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KengaRu [80]
2 years ago
15

A bookstore costs $90 a day to keep open, and it spends $13 for each book-

Mathematics
1 answer:
enot [183]2 years ago
7 0

Answer:

n = 30

Step-by-step explanation:

since it cost 90 to keep open, the equation needs to equal 90

90 = ?

because it cost 13 for a book and x equals the amount of books

90 = -13x

because you make 16 for each book

90 = -13x + 16x

now you can simply

90 = 3x

x = 30

so the answer is 30

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(<img src="https://tex.z-dn.net/?f=%28%5Csqrt%7B6%7D%20%2B%5Csqrt%7B3%7D%29%28%5Csqrt%7B2%7D-2%29" id="TexFormula1" title="(\sqr
Marta_Voda [28]

Answer:

-2.453

Step-by-step explanation:

sqrt(6) * sqrt(2) = 3.461

sqrt(6) * -2 = -4.899

sqrt(3) * sqrt(2) = 2.449

sqrt(3) * -2 = -3.464

sum of numbers equals

-2.453

7 0
2 years ago
on june 1, $40,000 of treasury bonds were purchased between interest dates. the broker commission was $600. the bonds pay intere
PtichkaEL [24]
Given:
treasury bond = 40,000
brokers commission = 600
interest rate = 12$ p.a
interest paid semi-annually, january 1 and july 1.

Since the treasury bond was sold on June 1, its interest revenue will only be equal to 1 month ( June 1 to July 1).

12% / 12 months = 1% per month

40,000 * 1% = 400 interest revenue to be recorded on July 1.
6 0
3 years ago
Find the secant of angle Z<br> A.4/5<br> B.4/3<br> C.3/5<br> D.5/3
Alex73 [517]

Answer:

D 5/3

Step-by-step explanation:

Secθ= Hypotenuse/Adjacent

Secθ=10/6

Simplify: 10/6 -->5/3

Ans: D 5/3

remember your six trigonometric functions:

Sinθ=Opp/Hyp -->Cscθ=Adj/Hyp

Cosθ=Adj/Hyp -->Secθ=Hyp/Adj

Tanθ=Opp/Adj-->Cotθ=Opp?Adj

It is basically the opposite of each other, don't forget when you are at the last step you simplify! never forget. Also working with square roots will be a bit tricky when converting to Csc/ Sec/ Cot. Just noting you that Square roots don't belong in denominators!

3 0
3 years ago
A person has utility function u(x, y) = 100xy + x + 2y. Suppose that the price per unit of x is $2, and that the price per unit
Kazeer [188]

Answer:

x = 250

y = 125

u(x,y) = 3125500

Step-by-step explanation:

As given,

The utility function u(x, y) = 100xy + x + 2y

P_{x} = 2 , P_{y} = 4

Now,

Budget constraint -

P_{x} x + P_{y} y = 1000

⇒2x + 4y = 1000

So,

Let v(x, y) = 2x + 4y - 1000

Now,

By Lagrange Multiplier

Δu = Δv

⇒< 100y + 1, 100x + 2 > = < 2, 4 >

By comparing, e get

100y + 1 = 2         ........(1)

100x + 2 = 4        .........(2)

Divide equation (2) to equation (1) , we get

\frac{100y + 1}{100x + 2} = \frac{1}{2}

⇒2(100y+1) = 1(100x+2)

⇒200y + 2 = 100x + 2

⇒200y = 100x

⇒2y = x

Now,

As 2x + 4y = 1000

⇒2x + 2(2y) = 1000

⇒2x + 2x = 1000

⇒4x = 1000

⇒x = 250

Now,

As 2y = x

⇒2y = 250

⇒y = \frac{250}{2} = 125

∴ we get

x = 250

y = 125

Now,

u(250, 125) = 100(250)(125) + 250 + 2(125)

                   = 3125000 + 250 + 250

                  = 3125000 + 500

                 = 3125500

⇒u(250, 125) = 3125500

3 0
3 years ago
How do you write 3.5 as a sum
denpristay [2]
There is no sum for 3.5

3 0
3 years ago
Read 2 more answers
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