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vichka [17]
3 years ago
15

(9, -3) 90° clockwise

Mathematics
1 answer:
stellarik [79]3 years ago
7 0

for a 90° rotation clockwise, use (x,y)--->(y,-x)

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Which of these strategies would eliminate a variable in the system of equations? { − x + 6 y = 8 7 x − y = − 2 ⎩ ⎪ ⎪ ⎨ ⎪ ⎪ ⎧ ​ −
PilotLPTM [1.2K]

Answer:

The required solution is x=\frac{98}{41}  and y =\frac{8}{123}.

Step-by-step explanation:

Given equations are

-x+6y = -2.......(1)

\frac87x-y=-2.......(2)

First we have to equate the coefficient of y or x. Here we equate the coefficient of y . So equation (2) multiply by 6.

Then the equation (2) becomes

\frac{8\times 6}{7}x-6y=-2\times6

\Rightarrow \frac{48}{7}x-6y=-12........(3)

Since the signs of y are is opposite, so we adding (1) and (2).

(-x+6y)+ \frac{48}{7}x-6y=-2-12

\Rightarrow -x+\frac{48}{7}x=-14

\Rightarrow \frac{-7x+48x}{7}=-14

\Rightarrow \frac{41x}{7}=-14

\Rightarrow x=\frac{-14\times 7}{41}

\Rightarrow x=\frac{98}{41}

Putting the value of equation (1)

-\frac{98}{41}+6y=-2

\Rightarrow 6y =-2+\frac{98}{41}

\Rightarrow 6y =\frac{-82+98}{41}

\Rightarrow y =\frac{16}{41\times 6}

\Rightarrow y =\frac{8}{123}

The required solution is x=\frac{98}{41}  and y =\frac{8}{123}

5 0
3 years ago
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The area of a circle is 111.6 square centimeters. What is the diameter? Use 3.1 for pi.​
Rasek [7]
Answer:

Points

Explanation:
8 0
3 years ago
A manufacturer produces both two-slice and four-slice toasters. The two-slice toaster takes 6 hours of labor to produce and the
frosja888 [35]

We have two products: a two-slice toaster and a four-slice toaster.

Lets call T the number of two-slice toasters produced and F the number of four-slice toasters produced.

If we have 300 hours per week of labor, the sum of the labor required for T and F has to be lower or equal to that value.

The labor hours that take to make the two-slice toasters can be written as 6*T, as it is the product of the hours per unit (6 hours/unit) by the number of units (T units).

The same can be done for F, where the labor required can be expressed as 10*T.

If we add these terms, and make them be less or equal than 300, we get:

6T+10F\le300

The production capacity is 40 units, so the sum of T and F has to be less or equal than 40.

We can express this as:

T+F\le40

Answer:

The system of inequalities for this problem becomes:

\begin{gathered} 6T+10F\le300 \\ T+F\le40 \end{gathered}

6T+10F<=300

T+F<=40

6 0
1 year ago
GEOMETRY HELP!! (Image here)
Deffense [45]

Step-by-step explanation:

option B is the correct answer of this question .

5 0
3 years ago
If sin(x) = 0 and cos(x) = 1, what is cot(x)?
Nata [24]

Answer:

undefined

Step-by-step explanation:

Sin(x) = 0 where x = 0

Cos(x) = 1 where x = 0

Cot(0) is undefined

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3 years ago
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