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expeople1 [14]
3 years ago
11

Se necesita comprar 85 saleros para su restaurante. Si los saleros vienen empacados en presentaciones de 2,3 y 5 unidades, cual

presentación debe elegir para poder comprar la cantidad exacta que necesita?; por que?
Mathematics
1 answer:
Pepsi [2]3 years ago
3 0

Responder:

5

Explicación paso a paso:

Dado que:

Número requerido de compra = 85

Unidades de paquete disponibles = 2, 3, 5

En su para comprar la cantidad exacta 85 de Saleros; la unidad de paquete a elegir debe ser;

Uno que es un factor de 85

Factores de 85: 1, 5, 17 y 85.

Por lo tanto, de las unidades de paquete disponibles disponibles, solo 5 es un factor de 85 y, por lo tanto, dará el número exacto de saleros necesarios.

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Maggie graphed the image of a 90 counterclockwise rotation about vertex A of . Coordinates B and C of are (2, 6) and (4, 3) and
Lemur [1.5K]

Answer:

A(2,2)

Step-by-step explanation:

Let the vertex A has coordinates (x_A,y_A)

Vectors AB and AB' are perpendicular, then

\overrightarrow {AB}=(2-x_A,6-y_A)\\ \\\overrightarrow {AB'}=(-2-x_A,2-y_A)\\ \\\overrightarrow {AB}\perp\overrightarrow {AB'}\Rightarrow \overrightarrow {AB}\cdot \overrightarrow {AB'}=0\Rightarrow (2-x_A)(-2-x_A)+(6-y_A)(2-y_A)=0

Vectors AC and AC' are perpendicular, then

\overrightarrow {AC}=(4-x_A,3-y_A)\\ \\\overrightarrow {AC'}=(1-x_A,4-y_A)\\ \\\overrightarrow {AC}\perp\overrightarrow {AC'}\Rightarrow \overrightarrow {AC}\cdot \overrightarrow {AC'}=0\Rightarrow (4-x_A)(1-x_A)+(3-y_A)(4-y_A)=0

Now, solve the system of two equations:

\left\{\begin{array}{l}(2-x_A)(-2-x_A)+(6-y_A)(2-y_A)=0\\ \\(4-x_A)(1-x_A)+(3-y_A)(4-y_A)=0\end{array}\right.\\ \\\left\{\begin{array}{l}-4-2x_A+2x_A+x_A^2+12-6y_A-2y_A+y^2_A=0\\ \\4-4x_A-x_A+x_A^2+12-3y_A-4y_A+y_A^2=0\end{array}\right.\\ \\\left\{\begin{array}{l}x_A^2+y_A^2-8y_A+8=0\\ \\x_A^2+y_A^2-5x_A-7y_A+16=0\end{array}\right.

Subtract these two equations:

5x_A-y_A-8=0\Rightarrow y_A=5x_A-8

Substitute it into the first equation:

x_A^2+(5x_A-8)^2-8(5x_A-8)+8=0\\ \\x_A^2+25x_A^2-80x_A+64-40x_A+64+8=0\\ \\26x_A^2-120x_A+136=0\\ \\13x_A^2-60x_A+68=0\\ \\D=(-60)^2-4\cdot 13\cdot 68=3600-3536=64\\ \\x_{A_{1,2}}=\dfrac{60\pm8}{2\cdot 13}=\dfrac{34}{13},2

Then

y_{A_{1,2}}=5\cdot \dfrac{34}{13}-8 \text{ or } 5\cdot 2-8\\ \\=\dfrac{66}{13}\text{ or } 2

Rotation by 90° counterclockwise about A(2,2) gives image points B' and C' (see attached diagram)

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3 years ago
ewan makes chess boards from wood each bored has 3 different kinds of wood he has 5 kinds of wood in his workshop maple cherry w
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He can make 15 chess boards.

All you need to do is multiply 3 by 5.

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I think it's right, but not 100% sure
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Answer:

8p +56 +16q

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8 (p+7+2q)

If we distribute the 8 into everything in the parenthesis, we get:

8p +56 +16q

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3 years ago
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