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3 years ago

Lisa had to draw 4trees for every flower she drew if she draws 90 plants in all how many will be flowers

Mathematics

2 answers:

Delicious77 [7]3 years ago

6 0

She drew 18 flowers and 72 trees (18x4=72) (90-72=18)

r-ruslan [8.4K]3 years ago

4 0

If kids drew 90 plants in total and for every 1 flower she draws she also draws 4 trees she would have drawn 18 flowers and 72 trees

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rita has 4 plants.She gets 9 more plants then rita gets 1 more plants. How many plants does she have know

Dmitrij [34]

The answer is 14 plants.

Explanation:

She already has 4 plants. She adds 9 more plants to the 4 plants. She will have 13 plants. And then she adds 1 plant to the 13 plants. She has now 14 plants.

Hope it helps!

5 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

Last one i hope (no pictures).

-BARSIC- [3]

Answer:

Step-by-step explanation:

RST = 90

90 - (22 + 41) = 27.

3x = 27

27/3 = 9

x = 9

8 0

3 years ago

What number must you multiply both sides of 3/4a=24 by to get equivalent equation a=32??

Mamont248 [21]

4 because 4 times 24 equals 96 then 96 divided by 3 equals 32

3 0

3 years ago

Helppp pleaseeeeee!!!

crimeas [40]

The correct answer is B C and D

5 0

3 years ago