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ikadub [295]
3 years ago
15

How to find the missing lengths and angles of a triangle

Mathematics
1 answer:
Vikki [24]3 years ago
5 0
Add every side up and then subtract it by 180
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The third term in an arithmetic sequence is 9 and the fifth term is 21 . If the first term if a1, which is an equation for the n
tino4ka555 [31]

Answer:

A: an = 6n - 9

Step-by-step explanation:

third term in an arithmetic sequence is 9

a3 = a + 2d

a + 2d = 9

the fifth term is 21

a5 = a + 4d

a + 4d = 21

a + 2d = 9 (1)

a + 4d = 21 (2)

Subtract (1) from (2) to eliminate a

4d - 2d = 21 - 9

2d = 12

d = 12/2

d = 6

Substitute d = 6 into (1)

a + 2d = 9 (1)

a + 2(6) = 9

a + 12 = 9

a = 9 - 12

a = -3

nth term of this sequence = a + (n - 1)d

= -3 + (n - 1)6

= -3 + 6n - 6

= 6n - 9

an = 6n - 9

3 0
2 years ago
Put these over a common denominator 3/5 4/7?
Rama09 [41]
We can pick a common denominator by multiplying.

3*7/5*7= 21/35

4*5/7*5= 20/35

We have our common denom is 15.

Our fractions: 21/35 and 20/35
7 0
3 years ago
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10 ounces of orange juice for $2.40 0r 8 ounces for $2.08
denis-greek [22]

Answer:

8 for $2.08

Step-by-step explanation:

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2 years ago
The school cafeteria is holding an election for students to vote on which items they would like to see on the lunch menu. The ch
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There are two choices to choose from:

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Since more students voted for the Grilled chicken, it will be on the lunch menu. 
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3 years ago
Write a word sentence for the equation 2.3m = 0.46
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Two point three mequals zero point fourty six
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3 years ago
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