All categories

3 years ago

Can somone pls help me? 3/5 of 65? And 2/3 of 210 and 2/7 of 42

Mathematics

1 answer:

marin [14]3 years ago

3 0

Answer:

3/5 of 60 is 36

2/3 of 210 is 140

2/7 of 42 is 12

You might be interested in

A miniature golf course recently provided its customers with 6 golf balls, of which 3 were blue. What is the experimental probab

Schach [20]

The next probable answer is 1:2

5 0

2 years ago

What is the commutative and associative propertys?

timama [110]

Answer:

Commutative property: states that the order in which we multiply numbers does not change the product.

Associative property: states that you can add or multiply regardless of how the numbers are grouped (aka parenthesis).

5 0

3 years ago

F(x)=17-5x at x=8 Help me plz

OLEGan [10]

The derivative is -5

4 0

3 years ago

Read 2 more answers

(NO LINKS)Please help I’m begging it been two days I keep sending questions all I been getting is links that hack your device so

tatiyna

Answer:

wdym by that what question actually

3 0

3 years ago

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