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lisabon 2012 [21]
3 years ago
7

Can someone please give me the answer.

Mathematics
2 answers:
statuscvo [17]3 years ago
8 0

Answer:

<em>x = 9</em>

Step-by-step explanation:

Vertical angles are congruent, so their measures are equal.

4x + 6 = 7x - 21

Subtract 7x from both sides.

-3x + 6 = -21

Subtract 6 from both sides.

-3x = -27

Divide both sides by -3.

x = 9

noname [10]3 years ago
5 0

Because of the postulate "Vertical angles are equal" we can write the equation:

4x + 6 = 7x - 21

Then solve:

(4x + 6) + 21 = (7x - 21) + 21

(4x + 27) - 4x = (7x) - 4x

27/3 = 3x/3

<u>x = 9</u>


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Find a set of parametric equations for y= 5x + 11, given the parameter t= 2 – x
Sati [7]

Answer:

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Step-by-step explanation:

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3) y = 5\cdot (x\cdot 1)+11 Associative and modulative properties

4) y = 5\cdot \left[(-1)^{-1} \cdot (-1)\right]\cdot x +11 Existence of multiplicative inverse/Commutative property

5) y = [5\cdot (-1)^{-1}]\cdot [(-1)\cdot x]+11 Associative property

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7) y = -5\cdot (-x+0)+11 Modulative property

8) y = -5\cdot [-x + 2 + (-2)]+11 Existence of additive inverse

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10) y = (-5)\cdot (2-x) + (-5)\cdot (-2) +11 Distributive property

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In consequence, the right answer is x = 2-t and y = -5\cdot t +21.

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3 years ago
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Feliz [49]

Answer:

6)  x = 40.5

8)  x = 16.5

Step-by-step explanation:

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simplify and cross-multiply to get:

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8 0
2 years ago
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