Answer:
20. y = 3·3^x
21. y = (1/3)^x
Step-by-step explanation:
These exponential functions can be written in the form ...
y = a·b^x
where a is the value of y when x=0, and b is the common ratio between terms that have x different by 1.
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20. The ratio is 9/3 = 3; the multiplier is 3 (the value of y when x=0), so the function is ...
y = 3·3^x
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21. The ratio is (1/3)/1 = 1/3; the multiplier is 1, so the function is ...
y = (1/3)^x
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<em>Alternate solution</em>
Each of these can be written in a more compact form:
20: y = 3^(x+1)
21: y = 3^(-x)
Factor out the common term "2".
2(13x+2y) = 54
Now, divide both sides by 2.
13x + 2y = 54/2. <-- <u>We could not divide into a whole number so it's a fraction.</u>
<u />
Simplify 54/2 to 27.
13x + 2y = 27 <--- <u>Since we have a whole number without a letter, we are done with that side.</u>
<u />
Now, we subtract 2y from both sides.
13x = 27 - 2y
Divide both sides by 13.
x = 27 - 2y/13.
<h3>Therefore, we get <u>x = 27 - 2y/13</u></h3>
That would be our final answer.
Good luck on your assignment!
- Emacathy
Answer:
9
Step-by-step explanation:
How I got my answer:
a+ bc turns into 7 + 4 x 1/2
First, you do 4 x 1/2 which equals 2 ( 4/1 x 1/2 = 2)
Then, you add 7 and 2
=9
Answer:
9
Step-by-step explanation:
4x-7
4(4)-7
16-7
9
Are you sure that one of the variables is v and not y?
v+4= -2(x-1)
Since you posted v, I will use v in place of y.
v + 4 = -2x + 2
v = -2x + 2 - 4
v = -2x - 2
Done!
