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2 years ago

Simplify the expression below: (-5x² + 2) - (4x² – 5x - 9)

Mathematics

1 answer:

lozanna [386]2 years ago

3 0

Answer:

-9x² + 5x + 11

Step-by-step explanation:

-5x² + (-4x²) + 5x + 2 + 9

-9x² + 5x + 11

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What is 1/8 divided by 3

deff fn [24]

1 : 3
8

Make the whole number a fraction, by putting it over 1.

1 : 3
8 1

Turn the second fraction upside down and multiply:

1 . 1 = 1 
8 3 24

S = 1/24

5 0

3 years ago

Help me please: 3/4 - 7/9 + 2/3 =

mojhsa [17]

Answer:

3/4-7/9+2/3=0.63

Step-by-step explanation:

.........

8 0

2 years ago

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Hurry a lot of Points!

yulyashka [42]

Answer:

17/20

Step-by-step explanation:

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3 years ago

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Show that 3 · 4^n + 51 is divisible by 3 and 9 for all positive integers n.

-BARSIC- [3]

Answer:

Step-by-step explanation:

Hello, please consider the following.

$3\cdot 4^n+51=3\cdot 4^n+3\cdot 17=3(4^n+17)$

So this is divisible by 3.

Now, to prove that this is divisible by 9 = 3*3 we need to prove that

$4^n+17$ is divisible by 3. We will prove it by induction.

Step 1 - for n = 1

4+17=21= 3*7 this is true

Step 2 - we assume this is true for k so $4^k+17$ is divisible by 3

and we check what happens for k+1

$4^{k+1}+17=4\cdot 4^k+17=3\cdot 4^k + 4^k+17$

$3\cdot 4^k$ is divisible by 3 and

$4^k+17$ is divisible by 3, by induction hypothesis

So, the sum is divisible by 3.

Step 3 - Conclusion

We just prove that $4^n+17$ is divisible by 3 for all positive integers n.

Thanks

4 0

3 years ago

Need help with this as soon as possible.

maw [93]

Answer:

after 9 weeks it would become 9*1+10=19 inches

and after w weeks it will be w*1+10 inches tall

hope this helps

Step-by-step explanation:

8 0

3 years ago

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