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VMariaS [17]
2 years ago
14

Evaluate the summation

Mathematics
2 answers:
polet [3.4K]2 years ago
6 0

Answer:

114

Step-by-step explanation:

The first term (a1) = 1 + 3 = 4   (substituting 1 for i)

The last term (L) = 12 + 3 = 15

So the sum of the 12 terms = (n/2)(a1 + L)

= (12/2) (4 + 15)

= 6 * 19

= 114   (answer)


Bad White [126]2 years ago
4 0

Answer:

114 so D is the correct choice


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Consider the parabola with a focus at the point (4,0) and directrix y = 3.
satela [25.4K]

Answer:

answer of your questions

Step-by-step explanation:

The process of obtaining the equation is similar, but it is more algebraically intensive. Given the focus (h,k) and the directrix y=mx+b, the equation for a parabola is (y - mx - b)^2 / (m^2 +1) = (x - h)^2 + (y - k)^2.

7 0
2 years ago
Divide a 5-inch line into two parts so that one part (a) 2 1/4 inches shorter than the other; (b) 3 times the other.
Ilia_Sergeevich [38]
Part a), solve this system of equations:
x + y = 5
x - y = 2.25
2x = 7.25
x = 3.625
y = 1.375

part b), solve this system of equations:
x + y = 5
x = 3y
y = 1.25
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3 0
2 years ago
Read 2 more answers
Which tipe of this method???​
Hoochie [10]

Answer:

It appears to be substitution

Step-by-step explanation:

I think you are talking about system of equations

6 0
3 years ago
The square of a number is equal to 17 times that number. What is the number?​
Alborosie

Answer:

17

Step-by-step explanation:

If you think about it, 17^{2} \\ is 17×17

Hope this helps!

8 0
2 years ago
A fruit company delivers its fruit in two types of boxes: large and small. A delivery of 3 large boxes and 8 small boxes has a t
Verdich [7]

Answer:

The Large Box Weighs 18 kg, and the small box weighs 6.5 kg

Step-by-step explanation:

Let a= the weight in kg of a large box

Let b= the weight in kg of a small box

Multiply both sides of (1)  by 4 and subtract (2) from (1)

1. 20a+8b=412

2. -3a-8b= -106

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a=18

and

5*8+2b=103

90+2b=103

2b=13

b=6.5

7 0
3 years ago
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