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pishuonlain [190]
3 years ago
6

A book store is having a 30% off sale. Diary of a wimpy kid books are now $6.30 each. What was the original price of the books.

Mathematics
1 answer:
aev [14]3 years ago
8 0
The books were $8.19 original
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En la casa de Juan, van a pedir pizza para la comida, pero cuando la van a pedir se dan cuenta que deben pedirla por perímetro o
Degger [83]

Responder:

La pizza con un perímetro de 100 cm es más grande ¿verdad?

Explicación paso a paso:

Deja que la pizza tenga forma circular.

Sea el área de la pizza = πd² / 4 y;

Perímetro de la pizza = πd

d es el diámetro de la pizza

Si la madre dice que el que tiene un perímetro de 100 cm es más grande, para estar seguros necesitamos obtener el diámetro de la pizza. La de mayor diámetro será la pizza más grande.

P = 100cm

100 = πd

d = 100 / π

d = 100 / 3,14

d = 31,85 cm

El diámetro de la pizza mamá es de 31,85 cm.

Si el padre dice que el que tiene un área de 100 cm² es más grande, obtengamos también el diámetro para estar seguros.

A = πd² / 4

100 = πd² / 4

400 = πd²

d² = 400 / π

d² = 400 / 3,14

d² = 127,39

d = √127,39

d = 11,29 cm

Por lo tanto, el diámetro de la pizza padre es de 11,29 cm.

Dado que el diámetro de la pizza madre es mayor que el de esa, la pizza con un perímetro de 100 cm es más grande, lo que demuestra que la madre tiene razón.

6 0
3 years ago
Find the number of subsets of the set {1, 2, 3, ..., 9}
Irina18 [472]

Answer:

512

Step-by-step explanation:

the number of subsets of the set {1, 2, 3, ..., 9} is : 2^9 = 512

6 0
2 years ago
3. Write equations of two lines, one with an x-intercept but no y-intercept and one with a y-intercept but
Vesnalui [34]
X = 50 (Is parallel to the y-axis so there is no intersection point)
Y= 40 (Is parallel to the x-axis so there is no intersection point)
Both no intercept with the other
6 0
3 years ago
The cost of a book was decreased from 60 to 50 by what percent the price decrased with solution​
Artist 52 [7]

Answer:

The price decreased by 16 1/3%, or approximately 16.3%

Step-by-step explanation:

Use the formula for percent change. If the answer is negative, it is a percent decrease. if the answer is positive, it is a percent increase.

percent change = (new price - old price)/(old price) * 100%

In this case, use:

new price = 50

old price = 60

percent change = (new price - old price)/(old price) * 100%

percent change = (50 - 60)/60 * 100%

percent change = -10/60 * 100%

percent change = -1/6 * 100%

percent change = -100/6% = -50/3% = -16 1/3%

The price decreased by 16 1/3%, or approximately 16.3%

7 0
3 years ago
“I​ ​am​ ​thinking​ ​of​ ​a​ ​number​ ​such​ ​that​ ​6​ ​less​ ​than​ ​the​ ​product​ ​of​ ​7​ ​and this​ ​number​ ​is​ ​85.”​ ​
Arada [10]

let x = the number

 7x - 6 =85

add 6 to each side

7x =91

divide each side by 7

x = 91 /7 = 13

Answer is B 13

4 0
3 years ago
Read 2 more answers
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