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Xelga [282]
11 months ago
10

Harry downloads album A which has 11 tracks.

Mathematics
1 answer:
Airida [17]11 months ago
6 0

Part a: Cost of downloading album B = 13.3 euros

Part b: Cost of downloading album B = 12.6 euros

Number of tracks in album A = 11 tracks

The total cost of downloading album A = 10.45 euro

Cost of each track on album A = Total cost of album/Number of tracks in the album

= 10.45/11

= 0.95 euro

Part a:

Number of tracks in album B = 14 tracks

Cost of album B = Number of tracks in album B * Cost of each track

= 0.95*14

= 13.3 euros

Part b:

The cost of 5 tracks on album B is 5p less therefore, the cost of 5 tracks will be 0.90*5 = 3.60 euros

The cost of 9 tracks on album B is 5p more therefore, the cost of 9 tracks will be = 1*9 = 9 euros

The total cost of downloading album B = 9+3.6 = 12.6 euros

Learn more about arithmetic:

brainly.com/question/22260035

#SPJ9

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sdas [7]

Answer:

9

Step-by-step explanation:

Plug in 3 for x, and the equation is 6 + 3, which is equal to 9.

4 0
3 years ago
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Una muestra aleatoria si 136 personas de 400 a quien se le aplica un nuevo medicamento experimentaron mejoría Desarrolla un inte
Rudiy27

Answer:

Intervalo de confianza

= (0.294, 0.386)

Step-by-step explanation:

La fórmula para el intervalo de confianza para la proporción se da como

p ± z × √p (1 - p) / n

Donde p = x / n

De donde de la pregunta anterior

x = 136 personas

n = 400 personas

p = 136/400

p = 0.34

z = puntuación z del intervalo de confianza del 95% = 1.96

Por lo tanto,

Intervalo de confianza =

0.34 ± 1.96 × √0.34 (1 - 0.34) / 400

= 0.34 ± 1.96 × √0.34 × 0.66/400

= 0.34 ± 1.96 × √0.000561

= 0.34 ± 1.96 × 0.0236854386

= 0.34 ± 0.0464234596

Intervalo de confianza

= 0.34 - 0.0464234596

= 0.2935765404

= 0.34 + 0.0464234596

= 0.3864234596

Hence:Intervalo de confianza

= (0.294, 0.386)

3 0
3 years ago
NEED THE ANSWER ASAP
ruslelena [56]

Answer:

I think it would be 208.

7 0
3 years ago
What’s the approximate value of x?
drek231 [11]

Answer:

Option C: 4

Step-by-step explanation:

<u>Use the Pythagorean Theorem:</u>

a^2+b^2=c^2

3^2+b^2=5^2

9+b^2=25

b^2=16

b=4

Therefore, the value of x is 4.

4 0
2 years ago
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Write a word problem for an expression that is three times as great as (15+7). Then write the expression.
Setler79 [48]

Answer:

the expression is 3(15+7). An word problem could be there are 15 apples and 7 bananas. Someone needs to buy 3 times the amount of those. This is represented by that expression.

Step-by-step explanation:

6 0
3 years ago
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