3 years ago

What’s 3•5+-5•4 And the dot is multiplication!

Mathematics

1 answer:

NeTakaya3 years ago

8 0

-5 is the answer ...............

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Which fractions are equivalent to 8/20 ?

Nadusha1986 [10]

Answer:

2/5. 4/10. 6/15. 8/20. 10/25. 12/30

Step-by-step explanation:

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3 years ago

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Vlad1618 [11]

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3 years ago

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Verify cot x sec^4x=cotx +2tanx +tan^3x

Tanzania [10]

Answer:

See explanation

Step-by-step explanation:

We want to verify that:

$\cot(x) \: { \sec}^{4} x = \cot(x) + 2 \tan(x) + { \tan}^{3} x$

Verifying from left, we have

$\cot(x) \: { \sec}^{4} x = \cot(x) \: ( 1 + { \tan}^{2} x )^{2}$

Expand the perfect square in the right:

$\cot(x) \: { \sec}^{4} x = \cot(x) \: ( 1 + { 2\tan}^{2} x + { \tan}^{4} x)$

We expand to get:

$\cot(x) \: { \sec}^{4} x = \cot(x) \: + \cot(x){ 2\tan}^{2} x +\cot(x) { \tan}^{4} x$

We simplify to get:

$\cot(x) \: { \sec}^{4} x = \cot(x) \: + 2 \frac{ \cos(x) }{\sin(x) ) } \times \frac{{ \sin}^{2} x}{{ \cos}^{2} x} +\frac{ \cos(x) }{\sin(x) ) } \times \frac{{ \sin}^{4} x}{{ \cos}^{4} x}$

Cancel common factors:

$\cot(x) \: { \sec}^{4} x = \cot(x) \: + 2 \frac{{ \sin}x}{{ \cos}x} +\frac{{ \sin}^{3} x}{{ \cos}^{3} x}$

This finally gives:

$\cot(x) \: { \sec}^{4} x = \cot(x) + 2 \tan(x) + { \tan}^{3} x$

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3 years ago

If 12 newborn babies are randomly selected, how many different gender sequences are possible?

ki77a [65]

If there are 2 genders it's 2^12, which is 4096

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2 years ago

I need help please (brainllest)

Ksenya-84 [330]

Answer:

-3 -13

0 -4

3 -1

6 14

///

-3 17

0 11

1 9

3 5

6 -1

Step-by-step explanation:

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2 years ago