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3 years ago

PLEASE ANSWER!!

Mathematics

1 answer:

Aleksandr [31]3 years ago

3 0

Answer: The true cost of the jacket is $27 dollars.

Step-by-step explanation: To find the cost of the jacket after the discount just do 30 X .1 to get 3. Then take 3 and subtract it from 30. The mistake the clerk made was he probably just saw 10% and did 30-10=20. The clerk might have brain damage because this is like 5th grade math.

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If the total cost of x apples is b cents, what is a general formula for the cost, in cents,of y apples?

Sergio [31]

If 'x' apples cost 'b' cents, then each apple costs (b/x) cents.

'Y' apples cost 'y' times the cost of each one . . . . . (y) times (b/x) or yb/x cents.

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4 years ago

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Lilo has 1,000 minutes per month on her cell

vodomira [7]

Answer: 1000= x+615
Explanation: the total minutes she has is 100” so x the value we are trying to find plus the minutes she already used should equal 1000. To solve you can subtract 615 from both sides of the equals sign which gives us a answer of 385 minutes left she can use

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3 years ago

Factor the polynomial x2 + 2x – 3x – 6 by double grouping. Group terms with common factors: (x2 + 2x) + (– 3x – 6) Factor the GC

garik1379 [7]

We have been given a polynomial and we are asked to factor our polynomial by double grouping.

$x^{2} +2x-3x-6$

First of all we will group terms with common factors. We can see that $x^{2}$ and 2x have a common factor x. Common factor of -3x and -6 is -3.

$x^{2} +2x-3x-6$

$(x^{2} +2x)+(-3x-6)$

Now we will factor out Greatest Common Factor from each group.

$x(x+2)-3(x+2)$

After factoring out GCF from each group we got (x+2) as our common binomial. Now we will write our polynomial as a product of two binomials as:

$(x+2)(x-3)$

Therefore, our polynomial as a product of two binomials will be $(x+2)(x-3)$ .

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3 years ago

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Un prisma cuadrangular regular tiene 4 m de arista de la base y 6m de altura Calcula el area y el volumen

mario62 [17]

Answer:

El área y volumen del prisma cuadrangular mencionado son respectivamente:

Área = $16m^{2}$
Volumen = $96m^{3}$

Step-by-step explanation:

Para solucionar este ejercicio debes recordar que un prisma cuadrangular tiene como base y como superficie cuadrados, por lo tanto, para calcular el área de dicho cuadrado puedes utilizar la siguiente fórmula:

Área de un cuadrado = $arista^{2}$

Ya que el ejercicio nos da el valor de la arista (4 metros), podemos reemplazarla en la ecuación y calcular:

Área de un cuadrado = $(4m)^{2}$
Área de un cuadrado = $16m^{2}$

Por último, para calcular el volumen debes multiplicar el área superficial, el área del cuadrado calculado, por la altura del prisma, cuyo valor dentro del enunciado es de 6 metros, de esta forma:

Volumen de un prisma cuadrangular = área superficial * altura
Volumen de un prisma cuadrangular = $16m^{2}$ * $6 m$
Volumen de un prisma cuadrangular = $96m^{3}$

Como puedes ver tras los cálculos, el área superficial del prisma es de $16m^{2}$ y su volumen es $96m^{3}$ .

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3 years ago

If one quarter (25 cents) is 25% of a dollar, what percent is 23 cents?

Ugo [173]

You need to apply the same reasoning.
25 cents is 25% of a dollar because they are 25 out of 100, that is 25/100 = 25%
For 23 cents is exactly the same reasoning:
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