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White raven [17]
3 years ago
14

3(n - 1) < 21 Does anyone know the answer and solution?

Mathematics
1 answer:
Likurg_2 [28]3 years ago
6 0

Answer:

n < 8

Step-by-step explanation:

3n - 3 < 21 \\ 3n - 3 + 3 < 21 + 3 \\ 3n = 24 \\  \frac{3n}{3}  <  \frac{24}{3}  \\ n  < 8

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La edad de Alejandro equivale a las dos quintas partes de la edad de Andrea. Si la suma de
Mariana [72]

Las edades de Andrea y Alejandro son 40 y 16 años, respectivamente.

En esta pregunta debemos traducir el enunciado en ecuaciones algebraicas y resolver el sistema resultante. Tras una lectura cuidadosa tenemos el siguiente sistema de ecuaciones:

y = \frac{2}{5}\cdot x (1)

x + y = 56 (2)

Donde:

  • x - Edad de Andrea, en años.
  • y - Edad de Alejandro, en años.

A continuación, procedemos a resolver el sistema:

(1) en (2):

x + \frac{2}{5}\cdot x = 56

\frac{7}{5}\cdot x = 56

7\cdot x = 280

x = 40

Por (1):

y = \frac{2}{5}\cdot 40

y = 16

Las edades de Andrea y Alejandro son 40 y 16 años, respectivamente.

Para aprender más sobre álgebra, invitamos cordialmente a ver esta pregunta verificada: brainly.com/question/8122776

8 0
3 years ago
The penny size d is given by the literal equation d = 4n - 2, solve for n
DedPeter [7]
Thanks for your question!

d = 4n -2
d + 2 = 4n
(d+2)/4 = n

Hope this helped!
8 0
3 years ago
How do you solve -14+6b+7-2b=1+5b
Ronch [10]
Step 1: Rewrite the equation

-14+6b+7-2B=1+5b


Step 2: Combine like terms


-14+6b+7-2b=1+5b

-7+4b=1+5b


Step 3: To isolate b, first add 7 on both sides

-7+4b=1+5b
+7 +7
_________
4b=8+5b


Step 4: Again, trying to isolate b, subtract 5b on both sides

4b=8+5b
-5b -5b
_______
-b=8

Step 5 (final step): Because the variable cannot be negative for a final answer, multiply each number by -1.

-1(-b=8)

b= -8


Final Answer: b=-8

Hope this helps :)
8 0
3 years ago
Read 2 more answers
<img src="https://tex.z-dn.net/?f=%7B%5Cboxed%7B%5Cmathfrak%5Cpink%7B%5Cfcolorbox%7Bpink%7D%7Bpink%7D%7BQuestion%7D%7D%7D%7D" id
Naddika [18.5K]

Answer:

First you would make 62% into \frac{62}{100}

7893+82-\frac{62}{100}

Than you would do 7893+82 which is 7975

7975-\frac{62}{100}

You would than simplify \frac{62}{100} which is \frac{31}{50}

7975- \frac{31}{50}

<u><em>Therefore your answer will be </em></u><em />\frac{398719}{50}<u><em> or in decimal form it will be </em></u><em />7974.38<em />

Hope that helps :>

6 0
2 years ago
The total daily sales, S, in the deli section of a supermarket is the sum of the purchases made by customers on a given day. (a)
MArishka [77]

Answer:

Step-by-step explanation:

FYI

Hope it will help

4 0
3 years ago
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