Answer: it will take the faster computer 15 minutes to do the job on its own.
Step-by-step explanation:
Let t represent the number of minutes it will take the faster computer to do the job on its own. It means that the rate at which it does the job per minute is 1/t
If it takes the slower computer 30 minutes to do the job on its own. It means that the rate at which it does the job on its own per minute is 1/30
By working together, they would work simultaneously and their individual rates are additive. Working together it takes two computers 10 minutes to send out a company's email. It means that the rate at which both computers work together per minute is 1/10 Therefore,
1/t + 1/30 = 1/10
Cross multiplying by 30x, it becomes
3x = x + 30
3x - x = 30
2x = 30
x = 30/2
x = 15 minutes
The answer is definitely c
Answer:
25
Step-by-step explanation:
-5^2 expanded is -5 x -5
- two negatives equal a positive
-visual representation of 5 x 5
O O O O O
O O O O O
O O O O O
O O O O O
O O O O O
Answer:
100*x + 14*y
Step-by-step explanation:
Tenemos que en el sistema decimal un número de 3 cifras se representa de este modo:
100*x + 10*y + z
También es llamado descomposición polinómica y de esta manera podremos encontrar la expresión algebraica.
Nos dicen la relación entre unidades y decenas, 4 veces mayor las unidades que las decenas, por lo tanto:
z = 4*y
Reemplazamos y nos queda:
100*x + 10*y + 4*y
reduciendo nos queda:
100*x + 14*y
Por lo tanto esta sería la expresión algebraica.
