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romanna [79]
3 years ago
8

WILL MARK YOU BRAINLIEST

Mathematics
1 answer:
kirza4 [7]3 years ago
5 0

Answer:

it is letter B

Step-by-step explanation:

hope it helps you

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A calculator which is marked at $120 is sold for cash at a 30% discount. How much change would Susan receive if she pays for the
solong [7]

Answer:

64 dollars

Step-by-step explanation: 120×30%= $36-$100= <u>$64</u>

5 0
2 years ago
How many hours are in 2 weeks if it is about 23.93 hours in a day?
klemol [59]
2 weeks (14 days) X 23.93 hours a day = 335.02 hours in 2 weeks 

so 14 x 23.93 = 335.02

hope I helped:)
3 0
3 years ago
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
The tennis team is creating one doubles team to play at its matches. There are 13 people on the tennis team. How many different
Lelu [443]
<span>As only one team is to be made that means we have to choose 2 people from total 13 people. As the order that two people are selected does not matter here so we just have to make all possible combination of the team So the answer is 13*12/2 answer= 78 ways</span>
3 0
3 years ago
Please me the shapes are confusing me please help quickly ​
nikdorinn [45]
Can you show the full screen ?
8 0
3 years ago
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