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EastWind [94]
2 years ago
14

The distance between the points (1,2) and (x,-1) is 5 units. Find the possible values of x​

Mathematics
1 answer:
Mariulka [41]2 years ago
7 0

Answer:

-3,5

Step-by-step explanation:

d =  \sqrt{(x _{2}  - x _1)  {}^{2} + (y _{2} - y _{1} {} ) {}^{2}  }

5 =  \sqrt{(x - 1) {}^{2} + ( - 1 - 2) {}^{2}  }

5 =  \sqrt{(x - 1) {}^{2} + ( - 3) {}^{2}  }

25 = (x - 1) {}^{2}  + 9

16 = (x - 1) {}^{2}

4 = x - 1

x = 5

Or

- 4 = x - 1

x =  - 3

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If a person puts 1 cent in a piggy bank on the first day, 2 cents on the second day, 3 cents on the third day, and so forth, how
cluponka [151]
This is an arithmetic sequence with the common difference being 1

and if u have 1 cent on day 1 and 2 cents on day 2....then on day 40, u would have 40 cents....but we need the sum of all the days..

the sum of an arithmetic sequence can be found using the formula :
sn = n(a1 + an) / 2
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a1 = first term = 1
an = last term = 40

now we sub
s(40) = 40(1 + 40) / 2
s(40) = 40(41)/2
s(40) = 1640/2
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4 0
3 years ago
21 is what percent more than 16
Serjik [45]
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7 0
3 years ago
Help pls asap!!!!!!!!!!!!!!!!!!!!
yawa3891 [41]
Hello!

We can put the x values in and see if we get y

Option 1:
Set A: y = 4x - 2

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y = -4 - 2

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Look at the next one to be sure

y = 4(1) - 2

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So the set A equation is correct we can look at set be now

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Try the next one to be sure

y = -2 + 4

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Hope this helps!
7 0
3 years ago
Whats negative one squared
Anni [7]

Answer:

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Step-by-step explanation:

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8 0
3 years ago
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kow [346]

Answer:

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