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OlgaM077 [116]
3 years ago
9

Help! 20 points for homework.

Mathematics
2 answers:
algol133 years ago
6 0
Please see attachement.

Alexeev081 [22]3 years ago
5 0

8: 17

9: 5

10: -14

11: 6

12: 8

14: 5

15: 3

16: 61

19: 8

20: -19

21: -50

22: Cant really see

23: 16

24: -31

25: -37

26: 8

27: -41

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The sum of the first 150 negative integers is represented using the expression What is the sum of the first 150 negative integer
Kamila [148]

Answer:

C. -11,325

Step-by-step explanation:

  • To know the answer, is convenient to replace some values of "n" in the sum \sum_{(n=1)}^{150}[-1-(n-1)].
  • The result would appear after adding up every value of the expression \sum_{(n=1)}^{150}[-1-(n-1)] when n=1,2,3.....,150.
  • When n=1, the expression takes the value of (-1): [-1-(1-1)]= (-1)-0=-1.
  • When n=2, the expression takes the value of (-2): [-1-(2-1)]=-1-1=-2.
  • Following this way, for every n, we will obtain -n, then, the sum will be: -1-2-3-4-5-6-...-150. This sum can actually be expressed as \sum_{n=1}^{150}(-n), which is the result of solving the initial expression of the sum -1-(n-1)=-1-n+1=-n.
  • Finally, the sum of n=-1 to n=-150 equals -11,325.
7 0
4 years ago
Read 2 more answers
Y=x^2+12x+35 into the form y=(x-h)^2+k
LiRa [457]

Answer:

y = (x + 6)² - 1

Step-by-step explanation:

So there are two ways of doing it, completing the square or partial factoring (which is what i prefer and will show)

so we will get x first:

x^2+12x

We are factoring x

x(x+12)

Now you do x=-12/2

x=-6

Now that you have x, you plg that back into the equation to get y

y= -6^2 +12(-6) +35

= 36-36+35

=-1

Put into vertex form

y = (x + 6)² - 1

4 0
2 years ago
How much interest will you get on $800 investment for 1 year at 6.45% ?
Lunna [17]
800 * ( 6.45 / 100 ) = 8 * 6.45 = 51.6$ ;
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3 years ago
-7x-2y=-13<br> x-2y=11<br><br><br> ***PLS SHOW STEPS***
tino4ka555 [31]

Answer:

Step-by-step explanation:

-7x-2y=-13

x-2y=11

(subtract the first inequality from the second)

-7x-x = -8x

-2y-(-2y) = 0

-13-11= -24

-8x=-24

x=3

(now place the x value into the second inequality)

3-2y=11

-2y=11-3

-2y=8

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x=3

y=-4

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What is the missing length of the triangle?
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Answer:

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