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s344n2d4d5 [400]
2 years ago
8

The first term of an arithmetic progression is 80 and the common difference is -3. what is the greatest possible sum of the firs

t n terms of this sequence, and for which value of n does it occur?
I need help with this question, in advance thank you :)​
Mathematics
1 answer:
ikadub [295]2 years ago
5 0

Answer:

S=157

Step-by-step explanation:

an= a1+(n-1)d

a2=80+(2-1)(-3)

a2=80-3

a2=77

Sn=(a1+an)*n/2

S2=(80+a2)*2/2

S2=(80+77)*1

S2=157

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<img src="https://tex.z-dn.net/?f=3x%20%7B%20%7D%5E%7B2%7D%20%20%3D%20%20-%2054%20" id="TexFormula1" title="3x { }^{2} = - 54
valkas [14]

Answer:

No real solutions

Step-by-step explanation:

Divide both sides by 3

3x^3/3=-54/3

x^2=-18

Take square root

x=±√−18

4 0
3 years ago
The volume of 10000 drops of liquid is 10 fluid ounces what iscthe volume of 10 drops
slega [8]
What we know: 
-volume of 10,000 drops is 10 fluid ounces

Step 1: Divide 10,000 by 10 (to find how much we need to divide 10 by to get our answer)

10,000/10=1,000

Step 2: Divide 10 by 1,000 (to find our answer)

10/1,000=0.01

Our answer is 0.01. The volume of 10 drops of liquid is 0.01 fluid ounces.
3 0
3 years ago
Which expression can be used to find the surface area of the following rectangular prism ?
Igoryamba

Answer:

i think.c) is correct answrr

6 0
3 years ago
What is 15/18 in simplest form
Julli [10]

The answer is: 5/6 or 0.833333

3 0
3 years ago
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vfiekz [6]
-2 + 3(4x - 3) = 16
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X = 2 3/12
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2 years ago
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