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marishachu [46]
3 years ago
12

4n-(7-6n) Helppp plz

Mathematics
1 answer:
belka [17]3 years ago
4 0
4n - (7-6n)
4n -7 +6n (multiply minus to 7-6n)
10n -7 is the answer
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se vendieron 144 boletos. 2 pesos por adulto y un peso por niño, si se gastaron 207 pesos cuantos boletos de adulto se vendieron
natulia [17]

Answer:

Se vendieron 81 boletos de niños y 63 boletos de adultos.

Step-by-step explanation:

La cantidad de boletos vendidos es igual a:

144 = a + n   (1)

En donde <em>a </em>es por adultos y <em>n</em> por niños

A su vez, el dinero gastado equivale:

207 = 2*a + 1*n   (2)

Resolviendo la ecuación (1) para <em>a:</em>

a = 144 - n   (3)

Introduciendo (3) en la ecuación (2) tenemos:

207 = 2*(144 - n) + n

n = 81

Ahora podemos calcular el numero de boletos de adultos vendidos introduciendo <em>n</em> en la ecuación (3):

a = 144 - n = 144 - 81 = 63

Entonces, se vendieron 81 boletos de niños y 63 boletos de adultos.  

Espero que te sea de utilidad!      

5 0
3 years ago
4x-3y=6 <br> 4x+y=14 type a ordered pair
podryga [215]

Answer:

(3,2)

Step-by-step explanation:

If you graph the equations, they cross at this point.

5 0
3 years ago
In a random sample of 30 people who rode a roller coaster one day, the mean wait time is 46.7 minutes with a standard deviation
Rainbow [258]

Answer: C. (29,\ 37.8)

Step-by-step explanation:

The confidence interval for difference of two population mean is given by :-

\overline{x}_1-\overline{x}_2\pm z_{\alpha/2}\sqrt{\dfrac{s_1^2}{n_1}+\dfrac{s_2^2}{n_2}}

Given : Level of significance : 1-\alpha:0.99

Then , significance level : \alpha: 1-0.99=0.01

Critical value : z_{\alpha/2}=z_{0.005}=2.576

n_1=30\ ;\ n_2=50\\\\\overline{x}_1=46.7\ ;\ \overline{x}_2=13.3\\\\s_1=9.2\ ;\ s_2=1.9

46.7-13.3\pm(2.576)\sqrt{\dfrac{9.2^2}{30}+\dfrac{1.9^2}{50}}\approx33.4\pm4.38=(29.02\ ,37.78)\approx(29,\ 37.8)

Hence,  a 99% confidence interval for the difference between the mean wait times of everyone who rode both rides (29,\ 37.8)

5 0
4 years ago
Find the least common multiple.
nikklg [1K]
The least common multiple is 3
8 0
3 years ago
A customer deposits $500 in an account that pays 4% annual interest. What is the balance after 3 years if the interest is compou
lana [24]

A(t) = P(1+(r/n))^(nt)

A(3) = 500(1+0.04/1))^(1*3)

A(3) = 500(1.04)^3

A(3) = $562.43
6 0
3 years ago
Read 2 more answers
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