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elixir [45]
3 years ago
6

Two quantities, x and y, are directly proportional. if x is halved what happens to y

Mathematics
1 answer:
NISA [10]3 years ago
4 0

Answer:the same happens with the y too then y is also halved

Step-by-step explanation:

x1=x

y1=y

x2=x/2

y2=?

x1/y1=y2/x2

x/y=y2/x/2

y2=y/2

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8 times of the eight term of an arithmetic progression is equal to 12 times of the twelfth term. find its first term if the comm
denpristay [2]

Answer:

38

Step-by-step explanation:

We can express the 8th term as x and the 12th term as y.

This would mean that 8x=12y

Because the common difference between terms is -2 and term 8 and term 12 are 4 terms apart, this means that the 12th term is 8 less than the 8th term, so x-8=y

Now we can use this to substitute y with x in the first equation. This would give us:

8x=12(x-8)

Which we can expand and solve:

8x=12x-96

-4x=-96

Therefore x=24

This means the 8th term is 24 and the 12th term is 16 (24-8).

To test if this is correct we can do:

8x24=12x16

Which indeed are equal, both sides multiply to 192.

Now that we have our 8th term, we can find the 1st term, which is 7 terms away, therefore we just add 14 to the 8th term 24. (7x2=14)

24+14=38.

The first term is 38.

Hope this helped!

3 0
3 years ago
The three angles of a quadrilateral are 55,73,105 what is the fourth angle
-Dominant- [34]

Answer:

x = 127°

Step-by-step explanation:

Let A, B and C be the three angles of a quadrilateral such that they are 55, 73, 105 respectively.

We know that, the sum of angles of a quadrilateral is equal to 360°. Let fourth angle be x.

55+73+105+x = 360

233+x=360

x = 360-233

x = 127°

So, the fourth angle is equal to 127°.

3 0
2 years ago
How do i find the slope-<br> 20 points answer!<br> [imagine below included!]
Dafna11 [192]

Answer:

3/3 = 1

Step-by-step explanation:

The slope formula is..

Pick two formulas. Let's do (-5, -2) and (-2, 1)

x1  y1   x2 y2

(-5, -2)   (-2, 1)

\frac{1-(-2)}{-2-(-5)}    =   \frac{3}{3}  = 1

It'll work the same thing for (-2, 1) and (1,4)...

3/3 or 1 is a pattern between the points.

 

5 0
2 years ago
I really need help with this
kobusy [5.1K]

(x-2)^2=49\\\\x-2=7 \vee x-2=-7\\\\x=9 \vee x=-5

Then <u>E</u>

8 0
3 years ago
What is the rate of change represented in the table of values at right
grigory [225]
D! -48/8= -6 and -32/8= -4
5 0
3 years ago
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