3 years ago

The equation for the cross section of a parabolic telescope mirror is

Mathematics

1 answer:

Afina-wow [57]3 years ago

5 0

23 meters long cause 20 plus three= 23

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7nadin3 [17]

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2 years ago

Jennifer is shopping with her mother. They pay $2 per pound of tomatoes.

elena-14-01-66 [18.8K]

Answer:

The constant of proportionality is 2

The equation is y=2x

Step-by-step explanation:

The unit price or unit rate is $2

Let y represent the price of tomatoes, then the price of x tomatoes is

$y=2x$ dollars.

This represents a direct variation.

This equation is of the form $y=kx$ , where k=2 is the constant of proportionality.

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2 years ago

If A+B= 45° then prove that: tanA+ tanB+ tanA. tanB

Iteru [2.4K]

Answer:

See Explanation

Step-by-step explanation:

$A+B= 45 \degree \\ \\ assuming \: \tan \: on \: both \: sides \\ \\\implies \: \tan( A+B)= \tan 45 \degree \\ \\ \implies \: \tan( A+B)= 1 \: \: \\ ( \because \: \tan 45 \degree = 1) \\ \\ \implies \: \frac{\tan \: A +\tan \: B }{1 - \tan \: A .\tan \: B } = 1 \\ \\ \implies \: \tan \: A +\tan \: B = 1 - \tan \: A .\tan \: B \\ \\ \purple{ \implies }\: \orange{ \bold{\tan \: A +\tan \: B + \tan \: A .\tan \: B= 1 }} \\ \\ thus \: proved$