3 years ago

It’s not B I don’t know the answer but can someone help me with this plz plz I’m not understanding it

Mathematics

1 answer:

DaniilM [7]3 years ago

8 0

The correct answer is c

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3. Is XY Tangent to circle Z? Y 12 X (20 Z 18

Ratling [72]

Answer:

XY is a tangent

Step-by-step explanation:

Given

$XY = 12$

$WY = 20$

$WZ = 8$

Required

Is XY a tangent?

XY is a tangent if:

$WY^2 = XY^2 + WX^2$

Because XY should make a right angle at point X with the circle

Where

$WX = 2 * WZ$

So, we have:

$WY^2 = XY^2 + WX^2$

$WY^2 = XY^2 + (2*WZ)^2$

$WY^2 = XY^2 + (2WZ)^2$

$WY^2 = XY^2 + 4WZ^2$

This gives:

$20^2 = 12^2 + 4*8^2$

$400 = 144 + 256$

$400 = 400$

Yes, XY is a tangent

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3 years ago

The estimated difference of 3209 and 1893, when rounded off to the nearest ten is

almond37 [142]

Answer:

$= (3209) - (1893) \\ = 1.32 \times {10}^{3} \\ = 1320$

$\small{ \star{ \underline{ \blue{becker}}}}$

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3 years ago

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(4n⁴-8n+4) - (8n²+4n⁴+1) How do I simplify this expression?

Kobotan [32]

Answer:

-4n^4-4n^2-8n+3

Step-by-step explanation:

you combine the like terms

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3 years ago

If not able to awnser say it in the comments

olga_2 [115]

Answer:

Step-by-step explanation:

4y-9+4y simplified by combining like terms is 8y-9

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Ronda has 34.27 in her checking account. She deposits $25.00 into her account and then writes a check for $59.99. What is Ronda'

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3 years ago