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Darya [45]
3 years ago
14

Tickets for a touring production of Sweeney Todd cost $90 for orchestra seats and $60 for balcony seats. You purchase nine ticke

ts, some in the orchestra and some in the balcony, for a total cost of $720. How many orchestra tickets were purchased?
Mathematics
1 answer:
sertanlavr [38]3 years ago
8 0

Answer: 6 orchestra tickets were purchased

Step-by-step explanation:

orchestra purchased tickets = x

balcony purchased tickets = y

ou purchase nine tickets

total cost of $720

x + y = 9

90x + 60y = 720

----------------------------------------

x + y = 9 (*-60)

90x + 60y = 720

----------------------------------------

-60x - 60y = -540

90x + 60y = 720 (+)

----------------------------------------

30x = 180

x = 6

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an isosceles triangle is drawn with base angles 24 degrees and a base of 28 cm. Find the base angles of the isosceles triangle w
Fofino [41]

Answer:

Step-by-step explanation:

height = 14tan(24°)

area = 0.5(base)(height)

Find the angle that triples the height.

tanθ = 3×14tan(24°)

θ = arctan(3×14tan(24°)) ≅ 53.2°

8 0
2 years ago
Janice is thinking of two numbers. She says that two times the first number plus the second number is 47. In​ addition, the firs
Whitepunk [10]
Let the numbers be x and y, then
2x + y = 47 . . . (1)
x + 3y = 56 . . . (2)

(2) x 2 => 2x + 6y = 112 . . . (3)

(1) - (3) => -5y = -65 => y = -65/-5 = 13
From (2), x + 3(13) = 56 => x = 56 - 39 = 17

The two numbers are 13 and 17.
3 0
3 years ago
The product of two positive consecutive numbers is 42. What is the smaller number?
Temka [501]
X = first integer, y = second integer (right after x)

since y is right after x, we can say
y = x+1

If the product of the two integers (x and y) is 42, then
x*y = 42
x*( y ) = 42
x*( x+1 ) = 42 ... y is replaced with x+1
x*x + x*1 = 42
x^2 + x = 42
x^2 + x - 42 = 0
(x + 7)(x - 6) = 0 ... factor
x + 7 = 0 or x - 6 = 0
x = -7 or x = 6

The result must be positive as the problem states it, so we toss out x = -7
The only answer is x = 6

If x = 6, then
y = x+1
y = 6+1
y = 7

The two consecutive numbers are 6 and 7

The final answer is 6

Sure enough, 6*7 = 42 checks out
8 0
3 years ago
The mighty oak tree outside of Matt's house had to be cut down. He missed the beautiful tree and the shade it provided, and want
pav-90 [236]

Answer:

ten points

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
7500 dollars is placed in an account with an annual interest rate of 7.75%. To the nearest year, how long will it take for the a
MakcuM [25]

Answer:

It will take 55 years for the account value to reach 38200 dollars

Step-by-step explanation:

This is a simple interest problem.

The simple interest formula is given by:

E = P*I*t

In which E are the earnings, P is the principal(the initial amount of money), I is the interest rate(yearly, as a decimal) and t is the time.

After t years, the total amount of money is:

T = E + P.

In this problem, we ahve that:

T = 38200, P = 7500, I = 0.075

So

First we find how much we have to earn in interest.

38200 = E + 7500.

E = 38200 - 7500

E = 30700

How much time to earn this interest?

E = P*I*t

30700 = 7500*0.075*t

t = \frac{30700}{7500*0.075}

t = 54.6

Rounding up

It will take 55 years for the account value to reach 38200 dollars

5 0
3 years ago
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