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Brut [27]
3 years ago
15

Evaluate the expression 2x - 3y for x = -6 and y = -7

Mathematics
2 answers:
erica [24]3 years ago
4 0

Answer: 9

Step-by-step explanation:

First, you substitute the -6 and -7 for x and y. 2(-6) - 3(-7). Then, you do the first part of the equation: 2(-6)= -12. Then do the second part -3 (-7) which is 21 (remember positive x positive = positive). Then you are left with -12+ 21 which is 9.

timofeeve [1]3 years ago
3 0

Answer9

Step-by-step explanation:

mark brainliest PLEASE

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Answer:

  B = (-11, -17)

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Step-by-step explanation:

Reflection over the x-axis is accomplished by changing the sign of the y-coordinate:

  (x, y) ⇒ (x, -y) . . . . . reflection over x-axis

Reflection over the y-axis is accomplished by changing the sign of the x-coordinate:

  (x, y) ⇒ (-x, y) . . . . . reflection over the y-axis

__

  B = (-11, -17)

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__

<em>Check</em>

Reflection over both axes negates both coordinates. It is equivalent to reflection over the origin, or rotation 180°.

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