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2 years ago

Help please I don’t understand this problem

Mathematics

1 answer:

Molodets [167]2 years ago

8 0

Answer:

Step-by-step explanation:

We know that identity:

cos^2x+sin^2x=1.

From that we have:

cos^2x=1-sin^2x.

So it is:

cos^2x-sin^x=(1-sin^2x)-sin^2x=1-2sin^2x.

And this is A).

B) is not treu because cos^2 is not sin^2x+1

C) is not true because cos^2x-sin^x=1 is false.

D) is not treu because cos^2x is not sin^2x-1

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Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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2 years ago

Helpeoepeoeoeo show work

alukav5142 [94]

IMPORTANT THIGNS TO REMEMBER:

Has 20 lb. dog food!
Gives dog 1 3/5 everyday!
Find how much eaten after 2 days!
Find how much is left!

ANSWER:

Dog has eaten 3 1/5 after 2 days!

There is 16 4/5 left in bag!

EXPLANATION:

Since she gives 1 3/5 to her dog everyday and their asking for 2 days you would multiply 1 3/5 × 2 OR add 1 3/5 + 1 3/5

Which would give you 3 1/5

So, the dog has eaten 3 1/5 lb. of dog food in 2 days.

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2 years ago

What is the solutions to 0=x^2-x-6 two things ,,quadratic equationz,,,

natita [175]

Answer:

x1=3. x2=-2

Step-by-step explanation:

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

b=-1

a=1

c=-6

$x = \frac{ - ( - 1) + - \sqrt{ {( - 1)}^{2} - 4 \times 1 \times ( - 6) } }{2 \times 1}$

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$x = \frac{1 + - \sqrt{25} }{2}$

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2 years ago

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marusya05 [52]

Answer:

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l______\

Step-by-step explanation:

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2 years ago