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Alik [6]
3 years ago
14

What is 3x=15? If anybody knows

Mathematics
2 answers:
Anna11 [10]3 years ago
8 0

Answer:

5

Step-by-step explanation:

3 times what equals 15

Debora [2.8K]3 years ago
5 0

Answer:

3x means to multiply so this question means 3x=15 that x is five i believe

Step-by-step explanation:

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On a farm there are some cows and some chickens if the animals have a total of 40 heads and 112 legs how many cows are there? ho
tankabanditka [31]

Answer:

There are 16 cows and 24 chickens in the farm.

Step-by-step explanation:

A Cow has 4 legs

Chicken has 2 legs.

Lets take there x chickens AND,

there are y number of Cows.

Now we can write two equations for the number of heads and legs.

For the number of heads we can write,

x+y=40 <--------- 1st equation

For the number of legs we can write,

2x+4y=112 <------ 2nd equation

We can now solve the simultaneous equations to find x and y

Multiply 1st equation by 2 and deduct it from 2nd equation to remove x

⇒2x+4y-2*(x+y)=112-80

⇒2x+4y-2x-2y)=112-80

⇒2y=32

⇒y=16

Therefore, there are 16 cows in the farm.

Now we can substitute the y value to the 1st equation and find x value.

x+16=40

x=24

Therefore, there are 24 chickens in the farm.



6 0
3 years ago
The sum of the measures of angles xand y is 120°. The measure of the angle x is 12 less than the measure of the angle y. Find x
Troyanec [42]

Answer:
x = 54°
y = 66°

Step-by-step explanation:

x + y = 120° (given)
x = y - 12
Then, y + y - 12 = 120°
(y + y) - 12 = 120°
2y - 12 = 120°
2y = 120 + 12 = 132°
y = 132/2 = 66°
x = y - 12 = 66 - 12 = 54°
There you go :)

5 0
2 years ago
Write the equation of the line perpendicular to y=2/3 x−12 that passes through the point (4, -1) in slope-intercept form.
xenn [34]

Answer:

Step-by-step explanation:

perp. -3/2

y + 1 = -3/2(x - 4)

y + 1 = -3/2x + 6

y = -3/2x + 5

7 0
3 years ago
What is number pattern
anyanavicka [17]
A number patter is a list of numbers that follow a certain pattern like 2,4,6,8,10 is a pattern of 2's 
7 0
3 years ago
Como hago para calcular el porcentaje de unos datos agrupados , porfa ayuda no entiendo. osea tipo : tengo que calcular cual es
KatRina [158]

Answer:

Falta información para darte una respuesta exacta, así que voy a dar una explicación general de este tipo de problemas.

Querés saber cuál es el porcentaje de personas que trabajan y están en el rango de edades entre 31 y 46.

Entonces lo primero que tenemos que hacer es encontrar el número total de personas que trabajan, digamos que es T (esto es el 100%)

Luego hay que encontrar el número total de personas que trabajan y tienen entre 31 y 46, digamos que es N.

Podemos relacionar estas cantidades con porcentajes de la siguiente manera:

N = P

T = 100%

Donde P es el porcentaje que queremos calcular.

Si tomamos el cociente de esas dos ecuaciones, obtenemos:

N/T = P/100%

Resolviendo para P obtenemos:

(N/T)*100% = P

El porcentaje de personas que trabajan y tienen entre 31 y 46 va a ser entonces:

P = (N/T)*100%

Así sabiendo el número total de personas que trabajan y el número de personas que trabajan y además tienen edades entre 31 y 46, podemos calcular el porcentaje que queremos.

Particularmente decis que no sabes si colocar 3% o 4%.

Lo que podria implicar que tambien quizas tengas un problema de redondeo.

Si tenes un numero como:

3.a%

donde a es un digito entre 0 y 9

si a es menor que 5, entonces redondeamos para abajo, y asi obtenemos:

3.a% = 3%

si a es igual a 5 o mayor, redondeamos para arriba, asi obteniendo:

3.a% = 4%.

4 0
3 years ago
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