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Fudgin [204]
3 years ago
6

PLEASE HELP!!

Mathematics
1 answer:
Mariulka [41]3 years ago
6 0
2. 3. 5. are correct

1. and 4. are actually interchanged
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How to solve the exponential equation for 3^k2 • 3^-k+2 = 81
wariber [46]

Answer:

k=2

Step-by-step explanation:

3^k*2 * 3^-k+2 = 81

Factor out 81 to be : 3^4

Rewrite the equation:

k*2 - k+2 = 4

k^2 - 2k = 4

Simplify : k+2 = 4

            <u>    - 2   - 2</u>

             k = 2

6 0
3 years ago
Can someone please explain step by step on how I subtract fractions like for an a example!
kotykmax [81]

Keep the denominators the same and subtract the numerators. So for example in your example:

7/8 - 3/8

Leave the 8 alone. Subtract 3 from 7.

7 - 3 = 4

So answer is:

4/8

Sometimes they may have to simplify the answer, and in this case, 4/8 could be simplified to 1/2

3 0
2 years ago
Read 2 more answers
0.2, 0.19,3/5 greatest to least
nasty-shy [4]
3/5=0.6

3/5, 0.2, 0.19
7 0
3 years ago
Read 2 more answers
Number one and number two
Amanda [17]
1.  sum of exterior angles = 360 

so one interior angles = 180 - (360/30) = 180 - 12 = 168 degrees
sum of all the interior angles = 168*30 =  5040  
B


2.   H  

the sum of exterior angles of all polygons is 360 degrres

4 0
3 years ago
HEEELP Chose the correct answer:
photoshop1234 [79]

Answer:

8x-8

Step-by-step explanation:

if Lana is X year

then that makes Yan 3X-4

the father is twice the sum of their ages

3X-4+X=4X-4

the father being twice

his age should be

8X-8

4 0
3 years ago
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