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Vadim26 [7]
3 years ago
12

: Đẳng thức nào sau đây đúng ? A. cos4x – sin4x = 2-cos2x B. cos4x – sin4x = 1+2sin2x

Mathematics
1 answer:
Mazyrski [523]3 years ago
3 0

Step-by-step explanation:

A. cos4x-sin4x=2-cos2x

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Kisachek [45]

Answer:

probability of chosing a student that has a cat and a dog is 9/25

Step-by-step explanation:

And yes the Venn diagram is wrong because you forgot to subtract 9 from 15 and 16

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8 0
3 years ago
Find (f•f)(x) when f(x) = x^2-2 and g(x)= x-1
UkoKoshka [18]

Answer:

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Step-by-step explanation:

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6 0
3 years ago
you want to put $4000 in a simple interest account. it has a 2.5% annual interest rate. how long will it take you to earn $500 i
yaroslaw [1]
T=I/Pr
t:500/(4000*0.025)
t: 5 yrs
Dear Random17, the question to your answer requires the use of the formula I=Prt. The equation will look like 500=4000(0.025)t. Multiply 4000 times 0.025 to get 500=10t. T=50 years.

7 0
3 years ago
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Lisa [10]
4th one is defo right so it’s one of the rest
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VikaD [51]

Answer:

7 rings = $2.52

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Therefore 1 ring will cost $0.36.

4 0
3 years ago
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