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Novay_Z [31]
4 years ago
6

Please someone help me I’m confused

Mathematics
1 answer:
insens350 [35]4 years ago
4 0

Answer:

a2 =14

a4 = 22

a11 = 50

Step-by-step explanation:

an = 10 + (n-1) *4

n is the term number

Let n =2

a2 = 10 +(2-1)*4 =10 +(1)*4 = 14

Let n =4

a4= 10 + (4-1)*4 = 10 *3*4 = 10+12 = 22

Let n = 11

a11 = 10 +(11-1)*4 = 10 *10*4 = 10+40 = 50

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The sum of two numbers is 11 and their product is 128. find the numbers?
KatRina [158]
X+y=11
xy=128
x=11-y, so (11-y)y=128
11y-y²=128
y²-11y+128=0
use the quadratic formula to find y: y=(11+√391i)/2 or y= (11-√391i)/2
x=(11-√391i)/2, or x=(11+√391i)/2

so either there is an error in your question, or you have two unreal numbers:
(11-√391i)/2 and (11+√391i)/2
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Answer:

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the area of a regular octagon is 25 cm. what is the area of regular octagon with sides five times as large?
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3 years ago
PLS HELP WILL GIVE BRAINLEST AND GIVE 50 POINTS
goldenfox [79]

Answer:

Basically you add all the numbers shown there and divide by how many there are. So you just get the sum and divide that by 11 since there are 11 numbers. Happy to help! (mean)

Step-by-step explanation:

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