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3 years ago

If m∠XWY=20∘,m∠XWZ=40∘, and XY = 16, what is the value of YZ?

Mathematics

1 answer:

Blababa [14]3 years ago

8 0

Answer:

YZ=16

Step-by-step explanation:

Because they are parallel

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lapo4ka [179]

-31/15 is the correct answer

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3 years ago

Question 1- explain how Sheldon immediately knew howard was incorrect?

Dmitrij [34]

Answer:

Part 1) In the procedure

Part 2) In the procedure

Step-by-step explanation:

Part 1) Observing the graph

The roots are x=-1/2 and x=4

Remember that, the roots are the x-values when the value of y is equal to zero (the x-intercepts)

That's why Sheldon immediately realizes Howard's solution is incorrect

Part 2) we have

$y=2x^{2}-7x-4$

The formula to solve a quadratic equation of the form $ax^{2} +bx+c=0$ is equal to

$x=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

equate the equation to zero

$2x^{2}-7x-4=0$

$a=2\\b=-7\\c=-4$

substitute

$x=\frac{-(-7)(+/-)\sqrt{-7^{2}-4(2)(-4)}} {2(2)}$

$x=\frac{7(+/-)\sqrt{49+32}} {4}$

Howard's error is in this step, is wrong with the sign of the number 7, is positive instead of negative

$x=\frac{7(+/-)\sqrt{81}}{4}$

$x=\frac{7(+/-)9}{4}$

$x=\frac{7(+)9}{4}=4$

$x=\frac{7(-)9}{4}=-1/2$

4 0

3 years ago

5√5-2√5 can someone please simplify this before I throw my phone across the floor thankyou

Eddi Din [679]

Answer:

3 sqrt 5 ( or 6.7082039 as posted in earlier A )

Step-by-step explanation:

sqrt ( 5) ( 5-2) = 3sqrt 5

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2 years ago

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Answer:

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is the answer

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3 years ago