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Simora [160]
3 years ago
15

Describe how to combine like terms in the expression 3n + 4n -2

Mathematics
2 answers:
storchak [24]3 years ago
5 0
You can combine the same numbers with the same variables using the operation sign for each. For example, using your equation, you would combine the 3n and 4n which is 7n. So your equation would be
7n - 2
LiRa [457]3 years ago
5 0
Combining like terms means that if u have two terms that are the same coefficient like 3n and 4n you have to either add or subtract because You have to have only one n in one side so u add 3 to 4 and u get 7n. Another example: 3n-2= 4n you would have to the same thing which is to add both. I'm sorry I'm not the best at explaining 
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Rochelle can run 800 meters in 5 minut
Semmy [17]
To find how much she can run in one minute we’re going to divide 800 by 5, to which we get 160.

She runs 160 meters in one minute.

We want to know how many meters she can run in 9 minutes.

160 * 9 = 1,440

She can run 1,440 meters in 9 minutes.
8 0
3 years ago
Which equation is not equal to 6^3/6^6 ?: 1/6^2 6^-3 1/216 1/6^3
SCORPION-xisa [38]
The answer would be 60 because its multiplication all those numbers

4 0
2 years ago
4) A random sample of students at Westcott Elementary were asked how many siblings they had. The following data was collected: 0
netineya [11]
A) 0
B) 6
C) middle number, or middle 2, averaged, so 3
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6 0
3 years ago
4. Andrés desea embaldosar el piso de su casa que tiene 375 cm de ancho y 435 cm de largo. Calcula la longitud del lado que tend
svetlana [45]

Answer:

Sabemos que el piso es un rectángulo de 435 cm de largo y 375 cm de ancho.

Recordar que para un rectángulo de largo L, y ancho W, el área es:

A = L*W

Entonces el área del piso, será:

A = 435cm*375cm = 163,125 cm^2

Primero, sabemos que se utilizaran baldosas (las cuales son cuadradas) y queremos saber la longitud de lado que tendrían las baldosas.

No tenemos ningún criterio para encontrar este lado, solo que (si queremos usar un número entero de baldosas) el largo L del lado de la baldosa deberá ser un divisor de tanto el ancho como el largo del suelo.

Dicho de otra forma

el largo, 435cm, tiene que ser múltiplo de L

el ancho, 375cm, tiene que ser múltiplo de L.

Por ejemplo, ambos números son múltiplos de 5, entonces podríamos tomar L = 5cm

En este caso, el área de cada baldosa es:

a = L^2 = 5cm*5cm = 25cm^2

Y el número total de baldosas que necesitaría usar esta dado por el cociente entre el área del suelo y el area de cada baldosa.

N = ( 163,125 cm^2)/(25cm^2) = 6,525 baldosas.

También sabemos que ambos números (435cm y 375cm) son múltiplos de 15cm

Entonces las baldosas podrían tener 15cm de lado.

En este caso, el área de cada baldosa es:

A = (15cm)^2 = 225cm

En este caso el número total de baldosas necesarias será:

N =  ( 163,125 cm^2)/(225cm^2) = 725 baldosas.

5 0
3 years ago
a dress shirt that normally cost $38.50 is on sale and being advertised as a 30% decrease. what percent expression could be used
astraxan [27]

.7 * 38.5 = original price

.7 * 38.5 = $26.95

4 0
2 years ago
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