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8090 [49]
2 years ago
7

If ST=19 and S lies at -4 , where could T be located?

Mathematics
1 answer:
Natasha2012 [34]2 years ago
8 0

Answer:

15 or -23

Step-by-step explanation:

I think you probably already turned this in but in case you haven't:

ST = 19 means that line segment ST is 19 units long. If we know that S is at -4, then T has to be 19 units away from -4, right?

So there's two directions we could go.

Add 19 to -4 to get 15, so T could be at 15. (If there's a line drawn between -4 and 15, it would be 19 units long.)

But the line could go left, towards negative infinity, too. So if we subtract 19 from -4, we'd get -23. T could also be at -23. (If there's a line drawn between -4 and -23, it would also be 19 units long. There's no such thing as a negative length.)

Please mark as Brainliest! :)

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Can someone understand this i know its substitution for sure if i dont get wrong
svlad2 [7]

4x - y = 3

y = 2x + 13


Substitute the second equation into the first equation:

4x - y = 3  [since y = 2x + 13, you can substitute (2x + 13) for "y" in the equation]

4x - (2x + 13) = 3    Distribute/multiply - into (2x + 13)

4x - 2x - 13 = 3  

2x - 13 = 3       Add 13 on both sides

2x = 16     Divide 2 on both sides

x = 8


Now that you know x = 8, plug it into one of the equations to find y

y = 2x + 13

y = 2(8) + 13

y = 16 + 13

y = 29


x = 8, y = 29  or  (8, 29)


[proof]

4x - y = 3

4(8) - 29 = 3

32 - 29 = 3

3 = 3


y = 2x + 13

29 = 2(8) + 13

29 = 16 + 13

29 = 29


7 0
2 years ago
13 POINTS PLEASE HELP ME!!!
Natasha_Volkova [10]

First problem:

n/4 + 2 = -9

        -2      -2

n/4 = -11

x4       x4

n = -44

Check:

-44/4 + 2 = -9

-11 + 2 = -9

-9 = -9

Second problem:

3/4x = -12

0.75x = -12

--------     ----

0.75       0.75

x = -16

3/4 * (-16) = -12 OR 0.75 * (-16) = -12

-12 = -12

Still get the same answer.



7 0
2 years ago
What is the m∠1? 21° 42° 71° 82°
bonufazy [111]

Answer:

The correct answer is 71, correct on        e d g e n u i t y.

Step-by-step explanation:

Can i please get brainlist?

5 0
2 years ago
Which property was applied to create this equivalent expression? 7x+(5+6×)--->(7x+5)+6x
liraira [26]

Answer:

Associative property is applied

Step-by-step explanation:

7x+(5+6×)--->(7x+5)+6x

In the given expression , the terms are grouped in different order

In associative property, we can group the numbers in any order

(a+b)+c -------> a+(b+c)

first two terms are grouped on the left side

last two terms are grouped on the right side

7x+(5+6×)--->(7x+5)+6x

In the given expression, the terms are grouped in different order

So Associative property is applied

5 0
2 years ago
Read 2 more answers
Please I really need help
aniked [119]

Answer:

use your brain

Step-by-step explanation:

5 0
1 year ago
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