Find the sum of the first 47 terms of the following series, to the nearest integer.
9,18,27,...
2 answers:
18 is the answer hood this will help you
Answer:
10152
Step-by-step explanation:
Common difference:
18-9=9
27-18=9
d=9
Explicit formula:
an = a1 +(n-1)d
a47 = 9+ (46)(9)
a47 = 423
Find sum: Sn = n(a1+an)/2
47(9+423)/2
47(423)/2 = 20304/2 = 10152
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Answer:
d
Step-by-step explanation:
becaus ei did
Answer:
y = -7
Step-by-step explanation:
Put x = 2 in any one of the equation
5x +2y = -4
5*2 + 2y = -4
10 +2y = -4
2y = -4 -10
2y = -14
y = -14/2
y = -7
You can go to the app Photomath if you want the step of the explanation
A circle is 360 degrees so 360 divided by 20=18 so 20 degrees is one 18th of a circle
Answer:
8y = -6
Step-by-step explanation:
Simply add the equations as you would numbers.
The 'x's cancel each other out. The 'y's add together as normal numbers.
9 + (-15) = -6
Hope that this helps!
