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murzikaleks [220]
3 years ago
6

Use the commutative and associative properties as needed to simplify the expression. (12+a)+14

Mathematics
1 answer:
timama [110]3 years ago
6 0

Answer:

26+a

Step-by-step explanation:

(12+a)+14

(12+14)+a

26+a

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El quintuple de un número cuadrado disminuido en 9 da como resultado 36;¿cual es ese número?
hram777 [196]

Usando un sistema de ecuaciones, se encuentra que ese número es n = -3 o n = 3.

<h3>¿Qué es un sistema de ecuaciones?</h3>

Un sistema de ecuaciones es cuando dos o más variables están relacionadas y las ecuaciones se construyen para encontrar los valores de cada variable.

En este problema, la variable es el número n.

El quintuple de un número cuadrado disminuido en 9 da como resultado 36, o sea, la ecuación es:

5n² - 9 = 36

5n² = 45

n² = 9

n = -3 o n = 3.

Puede-se aprendes mas a cerca de sistema de ecuaciones en brainly.com/question/27305333

6 0
2 years ago
For what values of x is the rational expression below undefined? x-7/x^2-7x-8
alekssr [168]
We have

f(x)=(x-7)/(x²<span>-7x-8)

resolving the quadratic equation
using a graph tool-------- > see the attached figure
x=-1  x=8
therefore
</span>(x-7)/(x²-7x-8)=(x-7)/[(x+1)*(x-8)

the answer is  -1  and  8



5 0
3 years ago
How can you prove that a conjecture is false? :)
meriva

Answer:

you have to find only one example in which the conjecture is not true.

6 0
3 years ago
Read 2 more answers
Quotant of 2 more than a number and 5 is 8
DaniilM [7]

Answer:

2 + n ÷ 5 = 8

Step-by-step explanation:

Just by looking at what the exercise is saying, "quotient" tells you that you will be dealing with division. The rest is simple.

I am joyous to assist you anytime.

8 0
4 years ago
A biologist is studying the elk population in a county park. She starts with only 2 elk and observes that the number of elk trip
DochEvi [55]

Answer:

The expression that represents the population of elk is: \text{elk}(t) = 2*3^t. It'll take 6 years for the population to reach 1,458 individuals.

Step-by-step explanation:

Since the number of elks triples every year and starts at \text{elk}(0) = 2, then after the first year the population will be:

\text{elk}(1) = \text{elk}(0)*3 = 2*3

While on the second year, it'll be:

\text{elk}(2) = \text{elk}(1)*3 = 2*3*3 = 2*3^2

On the third year:

\text{elk}(3) = \text{elk}(2)*3 = 2*3^2*3 = 2*3^3

And so on, therefore the expression that describes the population of elk as the years passes is:

\text{elk}(t) = 2*3^t

If we want to know the number of years until the population reach 1,458 elk, we need to apply this value to the left side of the equation and solve for t.

1458 = 2*3^t\\3^t = \frac{1458}{2}\\3^t = 729\\ln(3^t) = ln(729)\\t*ln(3) = ln(729)\\t = \frac{ln(729)}{ln(3)} = 6

The population will reach 1,458 elk in 6 years.

8 0
3 years ago
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