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gtnhenbr [62]
3 years ago
5

Tickets to a concert cost $2 for children and $5 for adults. If 630 people attended the concert and the ticket sales totaled $2,

910, how many children attended the concert?
Mathematics
1 answer:
Amanda [17]3 years ago
8 0
C+a=630

a=630-c

2c+5a=2910 using a found above in this we have:

2c+5(630-c)=2910

2c+3150-5c=2910

-3c+3150=2910

-3c=-240

c=80

So 80 children attended the concert.
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Creating an Exponential Model
MArishka [77]

Answer:

P = $300

r = 0.15

n = 12

$544.61  (to the nearest cent)

P(1+r)^t

$524.70  (to the nearest cent)

Step-by-step explanation:

P = principal amount = $300

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n = number of times interest is compounded per unit t = 12

<u>How much she'll owe in 4 years</u>

P = 300

r = 0.15

n = 12

t = 4

P(1+\frac{r}{n})^{nt}=300(1+\frac{0.15}{12})^{12 \times 4}

= $544.61  (to the nearest cent)

<u>Yearly compounding interest rate</u>

<u />P(1+r)^t

<u>How much she'll owe in 4 years at yearly compounding interest</u>

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4 0
2 years ago
Arrange the equations in the correct sequence to rewrite the formula for displacement, , to find a. In the formula, d is displac
OverLord2011 [107]

Answer:

2(d-vt)=-at^2

a=2(d-vt)/t^2

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Step-by-step explanation:

Arrange the equations in the correct sequence to rewrite the formula for displacement, d = vt—1/2at^2 to find a. In the formula, d is

displacement, v is final velocity, a is acceleration, and t is time.

Given the formula for calculating the displacement of a body as shown below;

d=vt - 1/2at^2

Where,

d = displacement

v = final velocity

a = acceleration

t = time

To make acceleration(a), the subject of the formula

Subtract vt from both sides of the equation

d=vt - 1/2at^2

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d - vt= -1/2at^2

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Divide both sides by t^2

2(d - vt) / t^2 = -at^2 / t^2

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a= -2(d - vt) / t^2

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4 0
3 years ago
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