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goldfiish [28.3K]
3 years ago
12

A number is increased by 25% and the resulting number is then decreased by 20%. The final number is what percent of the original

number?
Mathematics
1 answer:
otez555 [7]3 years ago
6 0
5%. because if u subtract 25 by 5 u get 20. the final number is 5. thus 5%.
hope this helps
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Calcula y comprueba las ecuaciones: plisss lo necesito alguien me puede ayudar a) 2X = 6 b) 10 + Z = 20 c) P + 9 = 11 d) 3X + 8
vesna_86 [32]

Answer:

a) x=3

b) z=10

c) P= 2

d) X=7

e) U=1

Step-by-step explanation:

Resolver una ecuación consiste en hallar los valores de la variable que hacen cierta la igualdad.

a) 2x= 6

El coeficiente es el número junto a la variable. En este caso, el coeficiente es 2. Para eliminar este número en la expresión 2x, debido a que la variable x esta multiplicada por 2, deberás dividir ambos lados de la ecuación entre 2, debido a que la operación opuesta de la multiplicación es la división.

(2x)÷2=6÷2

x= 3

Comprobar la solución de una ecuación se hace al remplazar la variable en una ecuación con el valor de la solución. La solución debería satisfacer la ecuación cuando se ingresa en esta.

En este caso:

2*3= 6

6=6

b) 10 + z= 20

En este caso se debe sumar o restar la constante que se encuentra acompañando a la variable en ambos lados de la ecuación de manera de aislar el término de la variable. En este caso:

10 - 10 + z= 20 -10

z= 10

Comprobación:

10 + z=20

10 + 10=20

20=20

c) P + 9= 11

P +9 - 9= 11 -9

P=2

Comprobación:

2 + 9= 11

11=11

d) 3X + 8 = 29

En este caso, se suma o resta la constante en ambos lados de la ecuación y luego se elimina el coeficiente de la variable mediante la división o multiplicación. Esto es:

3X + 8 - 8= 29 - 8

3X= 21

3X ÷3= 21÷3

X=7

Comprobación:

3*7 + 8=29

21+8=29

29=29

e) 2U + 8= 10

2U + 8 - 8= 10 -8

2U= 2

2U ÷2= 2÷2

U=1

Comprobación:

2*1 + 8= 10

2 + 8= 10

10=10

8 0
3 years ago
I REALLY NEED HELP FAST! Name the marked angle in 2 different ways.
Vlad [161]

Answer:

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
3/24 =33/x. Use equivalent ratios to find the unknown value
Tasya [4]
X/the answer is 264
because 33 times 24 is 792 and divide that by 3 is 264
hope this helps :)
7 0
3 years ago
Twelve more than a number is nine.
Otrada [13]

Answer:

The number is -3.

Step-by-step explanation:

X = a number

X + 12 = 9

Rearrange to get X on its own.

X = 9 - 12

X = -3

7 0
3 years ago
Find the greatest common factor of the terms in the following expression 18x+12xy​
Anarel [89]
<h3>Answer:   6x</h3>

=============================================

Explanation:

Ignoring the variables for now, the GCF of 18 and 12 is 6. This is the largest factor found in both values

  • 18 = 6*3
  • 12 = 6*2

Now let's consider the variables. Both terms have an 'x' in them, but not a y. This means x will be tacked on the 6 we found earlier to get the overall GCF to be 6x.

Note how

18x + 12xy = 6x*3+6x*2y = 6x(3+2y)

Showing we can factor out the GCF using the distributive property.

8 0
3 years ago
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