All categories

1 year ago

N

Mathematics

1 answer:

aksik [14]1 year ago

8 0

Answer:

See below

Step-by-step explanation:

q = quarters value = .25 q

n = nickels = 4q value = .05 (4q)

summed = 12.60

.25q + .05(4q) = 12.60 <====== can be used to solve the problem

.45q = 12.60

q = 28 quarters then nickels = 4q = 112

You might be interested in

Which cypress ion is equivalent to 4(x+2) ? 6x 4(x)+4(2) 4(x)+4 8x

jenyasd209 [6]

Answer:

4(x) + 4(2)

Step-by-step explanation:

4(x+2) = 4(x) + 4(2)

Distribution property

5 0

2 years ago

What is the best and easiest method to use to find sides A and B?

Alchen [17]

what is the best and easiest method to use to find sides A and B?

3 0

2 years ago

Researchers are studying the distribution of subscribers to a certain streaming service in different populations. From a random

Katen [24]

Answer:

$CI = (0.17 - 0.27)\± 1.65\sqrt{\frac{(0.17)*(0.83) + (0.27)*(0.73)}{200}}$

Step-by-step explanation:

Given

$n = 200$

$x_1 = 34$ -- City C

$x_2 = 54$ --- City K

Required

Determine the 90% confidence interval

This is calculated using:

$CI = \bar x \± z\frac{\sigma}{\sqrt n}$

Calculating $\bar x$

$\bar x = \bar x_1 - \bar x_2$

$\bar x = \frac{x_1}{n} - \frac{x_2}{n}$

$\bar x = \frac{34}{200} - \frac{54}{200}$

$\bar x = 0.17 - 0.27$

For a 90% confidence level, the z-score is 1.65. So:

$z = 1.65$

Calculating the standard deviation $\sigma$

$\sigma = \sqrt{(\bar x_1)*(1 - \bar x_1) + (\bar x_2)*(1 - \bar x_2) }$

So:

$\sigma = \sqrt{(0.17)*(1 - 0.17) + (0.27)*(1 - 0.27) }$

$\sigma = \sqrt{(0.17)*(0.83) + (0.27)*(0.73)}$

So:

$CI = (0.17 - 0.27)\± 1.65\frac{\sqrt{(0.17)*(0.83) + (0.27)*(0.73)}}{\sqrt {200}}$

$CI = (0.17 - 0.27)\± 1.65\sqrt{\frac{(0.17)*(0.83) + (0.27)*(0.73)}{200}}$

7 0

2 years ago

Al's awesome autos advertised a special sale on cars - Dealer cost plus 5%!! Jack and Margaret boughta luxury sedan for $23,727.

Marat540 [252]

05/23727.90=100/x
105x=23727.90x100
105x=2372790
(105x)/105=2372790/105
x=22598

dealers cost is $22,598

the 105% is the 100% price of the car plus the 5% of that tax

5 0

3 years ago

1= 1/4c what is c ? pls help i could not figure this one out haha

tino4ka555 [31]

Step-by-step explanation:

it say the answer is 4 but I don't know how

8 0

2 years ago