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ira [324]
3 years ago
10

Jane watched one television program for 1/4 of an hour and then changed channels to watch another program for 20 min. Write an e

quation to describe the fraction of an hour that Jane watched television
Mathematics
1 answer:
photoshop1234 [79]3 years ago
6 0
Jane's TV watching = \frac{1}{4}hours + 20mins
=\frac{1}{4}hours + (20mins)( \frac{1hour}{60mins})
=\frac{1}{4}hours +  \frac{1}{3}hours
=\frac{3}{12}hours +  \frac{4}{12}hours
=\frac{7}{12}hours
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Porqué el valor del coeficiente de la variable al cuadrado de una función cuadratica no puede ser cero?
Nady [450]

Answer:

Ver respuesta abajo

Step-by-step explanation:

Una ecuación cuadrática es una ecuación que tiene la siguiente forma:

ax² + bx + c = 0

Donde:

a, b y c: coeficientes numéricos que acompañan a la incógnita.

Ahora bien, una función cuadrática es basicamente la misma ecuación cuadrática pero representada graficamente en un plano cartesiano.

Para que una ecuación o función sea cuadrática es absolutamente necesario y obligatorio que su expresión en forma de ecuación tenga el elemento "ax²", pues el "cuadrado" que es el exponente 2 que eleva la incógnita es lo que le da la característica de ecuación o función cuadrática.

Si el coeficiente que acompaña al x², es decir, el valor de a es cero, automaticamente pierde la condición de ser una función o ecuación cuadrática pues dicho término se hace cero su valor. En otras palabras, si x es un número cualquiera y está representado como incógnita, ¿qué sucede cuando multiplicas cualquier número por cero?, en este caso, el resultado es igual a cero:

Ejemplo:

0x² = 0 * x² = 0.

Por tanto, si el término cuadrático se hace cero, ya pierde la condición de cuadraticidad, y su gráfico no sería de forma parabólica, solo quedaría los términos bx + c, pero eso ya pertenece a una ecuación lineal o función afín.

Espero esto te sirva.

4 0
3 years ago
In testing hypotheses, which of the following would be strong evidence against the null hypothesis?
grigory [225]

Answer:

e. obtaining data with a small p-value.

Step-by-step explanation:

In the null hypothesis, we test if the mean respects certain condition, and on the alternate hypothesis, we test the opposite of the null hypothesis.

The decision depends on the pvalue:

If the pvalue is smaller than the level of significance, that is, the pvalue has small values, the null hypothesis is rejected, that is, it is strong evidence against the null hypothesis. Large pvalues do not give evidence against the null hypothesis.

So the correct answer is given by option e.

5 0
3 years ago
I need help! Answer as fast as you can. Marking brainlyiest
grandymaker [24]

Answer:

A

Step-by-step explanation:

We can break down what each term represents in the equation

60 is the constant. This is the base price that is paid regardless of workers and hours needed

Then there is 12nh. 12 represents the cost per hour for one worker. If the job takes only one hour, then it is 12 dollars per worker. Similarly, if the job only takes one person, then it is 12 dollars for each hour.

The most accurate answer is A

8 0
3 years ago
Kari has x green apples and y red apples. Which statement explains why x + y and y + x will each find the total number of apples
ehidna [41]
X+y and y+x are the same as stated by the commutative law.
This is because let’s say x=2 and y=3,
2+3=5 and 3+2=5
3 0
2 years ago
The graph of the quadratic function f is shown in the grid. Which of these best represents the domain of f?
Marysya12 [62]

Answer:

D) all real numbers

Step-by-step explanation:

domain refers to all of the x-values on the graph and this curve can extend indefinitely in both the positive and negative directions

6 0
2 years ago
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