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klemol [59]
3 years ago
9

Find the lengths x and y

Mathematics
1 answer:
Rus_ich [418]3 years ago
8 0
I hope this helps you

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What is the value of the arithmetic series below?
xxTIMURxx [149]

Answer:

(A)-494

Step-by-step explanation:

Given the arithmetic series

S_{19}=\sum_{k=1}^{19}4-3k

The terms in the sequence are:

  • When k=1, 4-3k=4-3(1)=1
  • When k=2, 4-3k=4-3(2)=-2
  • When k=3, 4-3k=4-3(3)=-5

Therefore, the terms in the sequence are: 1, -2, -5, ...

First term, a =1

Common difference, d=-2-1=-3

The sum of an arithmetic series, S_n=\dfrac{n}{2}[2a+(n-1)d]

Therefore:

S_{19}=\dfrac{19}{2}[2(1)+(19-1)(-3)]\\=9.5[2+18*-3]\\=9.5[2-54]\\=9.5*-52\\=-494

The correct option is A.

6 0
3 years ago
My cake recipe calls for 2/3 cup of chocolate chips. I want my cake to be three
Marizza181 [45]
You should use 2 cups of chocolate

8 0
3 years ago
(Wap) Urgent I need help with this question
Anit [1.1K]

Answer:

12.1

Step-by-step explanation:

In this question, we can use the pythagoras theorem to solve it.

the equation is \sqrt{11^{2}+5^{2}  } =   slant height.

                                          = 12.1

5 0
3 years ago
You run a non-profit agency and a benefactor passed away and left your organization 25% of his estate. If he had $384,000 in his
Andrews [41]
25% times $384,000 is $96
So the organization would receive $ 96 bucks
also 25 can be written .25 which make it much more easier to calculate. hope this help 
6 0
4 years ago
Read 2 more answers
How do you solve equations that contain addition or subtraction
ollegr [7]
To solve an addition problem, you simply add one number to the other. For example, If I want to add 4 to 5, I would write the equation 4 + 5 = 9. To solve a subtraction problem, you simply take a number away from another. For example, If I want to take 5 away from 9, I would write the equation 9 - 5 = 4. Hope I helped! :)
7 0
3 years ago
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