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3 years ago

Geometry: How do you know if a triangle is a dilation of another triangle?

1 answer:

4 0

If you can multiply or divide the original triangle to equal the second triangle, and if the angles are the same, then it is a dilation

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In the lottery every week, 2,000,000 tickets are sold for $1 apiece. Say 4000 of these tickets pay off $30 each, 500 pay off $80

jarptica [38.1K]

The expected value is just the weighted average of how much one ticket wins. To calculate it, we need to find the probabilities of winning each dollar amount, multiply each probability with it's respective dollar amount, then find the sum.

Let's call the winnings from one ticket X:

P(X=30) = 4000/2000000 = 0.002

P(X=800) = 500/2000000 = 0.00025

P(X=1200000) = 1/2000000 = 0.0000005

E(X) = 30*P(X=30) + 800*P(X=800) + 1200000*P(X=1200000) = 0.06 + 0.2 + 0.6 = 0.86

The answer is $0.86

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4 years ago

I need help with this ASAP .. I have to get it done before morning.. I need help with both of them ASAP

Anastaziya [24]

Step-by-step explanation:

there is a (V.O.A) which is vertically opposite angle

and in the given part he himself said that there is two = angles

so there for the two third angles are equal

so we can say they are similar

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3 years ago

A type of fish for your aquarium costs $7 each. You can spend at most $28. How many of these fish can you buy? Write an inequali

makvit [3.9K]

Answer: 4

Step-by-step explanation: Divide 28 by 7

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3 years ago

If tano =

Sati [7]

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

$\cos( \alpha ) = \frac{5}{13} \\$

$\tan( \alpha ) = \frac{12}{5} \\$

$\tan( \alpha ) = \frac{ \sin( \alpha ) }{ \cos( \alpha ) } \\$

$\frac{12}{5} = \frac{ \sin( \alpha ) }{ \frac{5}{13} } \\$

Multiply sides by 5 / 13

$\frac{5}{13} \times \frac{12}{5} = \frac{5}{13} \times \frac{ \sin( \alpha ) }{ \frac{5}{13} } \\$

$\frac{5 \times 12}{5 \times 13} = \sin( \alpha ) \\$

$\frac{12}{13} = \sin( \alpha ) \\$

$\sin( \alpha ) = \frac{12}{13} \\$

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3 years ago

ALGEBRA 2, PLEASE HELP ME

____ [38]

I believe the answer is cos^2 theta. Sec^2 theta on the right side of the equation is the inverse of Cos^2 theta, so multiplying the two together will get you 1. Cos^2 theta * Tan^2 theta = Sin^2 theta, and Cos^2 theta * 1 = Cos^2 theta. This all leads to the third and last step in the picture above.

4 0

4 years ago

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