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max2010maxim [7]
4 years ago
11

Y varies inversely as x and y=5 when x=3

Mathematics
2 answers:
cluponka [151]4 years ago
6 0
Xy=k

3*5=k

k=15

xy=15 or y=15/x
Veronika [31]4 years ago
3 0
So if somthing varies inversely then when one value goes up, the other value goes down so xy=z and z has to be the same so lets say that z=16
when x=2 y=8
when x=4 y=4
when x=8 y=2
when x=16 y=1
so xy=z
subtitute
(3)(5)=15
so if x=5 y=3
x=1 y=15
x=15 y=1
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Prove that every integer greater than 7 can be written by using 3's and 5's only. that is, for every n > 7 there exist non-ne
Taya2010 [7]
An integer may be a multiple of 3.
An integer may be 1 greater than a multiple of 3.
An integer may be 2 greater than a multiple of 3.

It is redundant to say an integer is 3 greater than a multiple of 3 (that's just a multiple of 3, we've got it covered).  Same for 4, 5, 6, 7...

Let's consider a number which is a multiple of 3.  Clearly, we can write 3+3+3+3+... until we reach the number.  It can be written as only 3's.

Let's consider a number which is 2 greater than a multiple of 3.  If we subtract 5 from that number, it'll be a multiple of 3.  That means we can write the number as 5+3+3+3+3+...  Of course, the number must be at least 8.

Let's consider a number which is 1 greater than a multiple of 3.  If we subtract 5 from that number, it'll be 2 greater than a multiple of 3.  If we subtract another 5, it'll be a multiple of 3.  That means we can write the number as 5+5+3+3+3+3+...  Of course, the number must be at least 13.

That's it.  We considered all the numbers.  We forgot 9, 10, 11, and 12, but these are easy peasy.

Beautiful question.
4 0
3 years ago
Original Equation: y = 2x + 7 Which equation will shift the graph of the original equation up 2 units?
Wittaler [7]
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If x = 0 then y=b, if A is the point where y intercepts y-axis, the coordinates of
A(0,b)
If you want to shift the graph up by 2 units, then you have to add 2 units to b
In our case original b=7, =so to shift it up, b becomes 7+2=9
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8 0
3 years ago
Please help with math
kykrilka [37]

Answer:

2nd option, x > 1.10

Step-by-step explanation:

7e^{2x}-5 > 58

Add 5 to both sides,

7e^{2x}-5+5 > 58 +5\\7e^{2x} > 63

Divided both sides by 7,

\frac{7e^{2x}}{7} > \frac{63}{7}

e^{2x} > 9

Apply Exponent Rule,

2x > 2ln(3)

\frac{2x}{2} > \frac{2ln(3)}{2}

x > ln(3) or x > 1.09861

Learn more about logarithms here: brainly.com/question/12049968

5 0
2 years ago
Can somebody help me i have to drag the functions on top onto the bottom ones to match their inverse functions.
stellarik [79]

Answer:

1. x/5

2. cubed root of 2x

3.x-10

4.(2x/3)-17

Step-by-step explanation:

8 0
4 years ago
Read 2 more answers
Twenty less than 8 times a number is the same as 15 more than the number
anygoal [31]
x-\ number\\\\
8x-20=15+x\ \ \ | subtract\ x\\\\
7x-20=15\ \ \ | add\ 20\\\\
7x=35\ \ \ | divide\ by\ 7\\\\
x=5\\\\Number\ is\ 5.
6 0
3 years ago
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