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2 years ago

Happy valentines day. To a good year, 50 points!

Mathematics

2 answers:

Ainat [17]2 years ago

8 0

Answer:

Happy Valentines Day to you well. Hoping you have a loving day. <3

Step-by-step explanation:

Kaylis [27]2 years ago

5 0

Answer:

thanks and good luck

Step-by-step explanation:

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Is this an identity? <br> 1+sec^2x=tan^2x

amid [387]

No, the correct identity is $\tan^2(x)+1=\sec^2(x)$ . It is obtained by dividing the both sides of the Pythagorean Trigonometric Identity by cos²(x):

$\sin^2(x)+\cos^2(x)=1\\\\
\dfrac{\sin^2(x)+\cos^2(x)}{\cos^2(x)}=\dfrac{1}{\cos^2(x)}\\\\
\dfrac{\sin^2(x)}{\cos^2(x)}+\dfrac{\cos^2(x)}{\cos^2(x)}=\dfrac{1}{\cos^2(x)}\\\\
\boxed{\tan^2(x)+1=\sec^2(x)}~~\blacksquare$

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4 years ago

how high would a two story building be? what about a 10 story building?what about a 30 story building

Svetlanka [38]

Generally one story in a building would be ten feet or three meters, a ten story would be 100, and a 30 story building would be 300 and so forth.

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4 years ago

What divided by 5 equal 1.21

oksano4ka [1.4K]

Set the number as x
x/5=1.21
Multiply by 5 on each side to cancel the 5 in the denominator.
x=6.05

Check your answer:
6.05/5=1.21
1.21=1.21

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4 years ago

F(x)=4x^2-9x-13 young quadratic formula!

Liono4ka [1.6K]

Answer:

x=13/4 or -1

Step-by-step explanation:

factorize the fraction

(4x^2+4x)(-13x-13)

4x(x+1) -13(x+1)

(4x-13)(x+1)

x=13/4 or x=1

I guess

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3 years ago

Mr. Sanchez bought some book s at the book sale, including 15 paperbacks books. 75% of all the books he bought were paperbacks.

Shtirlitz [24]

Answer:

Step-by-step explanation:

15 (3/4) divided by 75% is 5 (1/4).

5 (1/4) multiplyed by 100% is 20 (4/4)

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4 years ago