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SCORPION-xisa [38]
3 years ago
6

Please help with this question, I need to make sure I'm right. Thanks

Mathematics
1 answer:
Lina20 [59]3 years ago
4 0

an=4n+1

Sum of first 30 terms

a1+a2+.................a30

 Sn=(a1+an)*n/2

a1-----------first terms

an=---------last term-----a30

n= number of terms-----30

 calculation of a1

a1=4n+1=4*1+1=5

 calculation of an

a30=4*30+1=121

 S30=(a1+a30)*30/2

S30=(5+121)*30/2=1890

<span>The sum of first 30 terms is 1890</span>


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True or False:
atroni [7]

Answer:

no it can't because

Step-by-step explanation:

coz the sum of any two angle should be greater than 3rd side

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so triangle cant be made

3 0
4 years ago
Hansen won the raffle At the zoo and gets to feed the dolphins! The dolphin trainer gives Hansen a bucket of fish to divide even
Pachacha [2.7K]

Answer:

Number of dolphins in zoo * number of fish per dolphin.

Step-by-step explanation:

Hansen won the raffle At the zoo and gets to feed the dolphins! The dolphin trainer gives Hansen a bucket of fish to divide evenly among five dolphins. Each dolphin gets four fish. Which equation can you use to find the number of fish F in the bucket before hansen feeds them

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To obtain the initial number of fish in bucket before hansen began to feed the fishes :

Number of fish in bucket before hansen feeds then :

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5 * 4 = 20

6 0
3 years ago
solve |5x - 1| &lt; 1 a. {x|0 &lt; x &lt; 2/5} b. {x|x &lt; 0 or x &gt; 2/5} c. {x|-2/5 &lt; x &lt; 2/5}
aliina [53]
<span>|5x - 1| < 1
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0 < x < 2/5
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8 0
3 years ago
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Darya [45]
Hey there!

An obtuse angle is defined as an angle that is wider than 90° but less than 180°. For example, a 68° would not be considered obtuse, but a 107° would. As long as the degree is between 90 and 180, the angle is obtuse. Any other angle (either between 0 and 90 OR 180 and 360) is not obtuse. 

You can use this information to answer the question based on the angles you have been given. 

Hope this helped you out! :-)
5 0
4 years ago
Fill in the blanks for the expression
Oduvanchick [21]

Answer:

Step-by-step explanation:

80

7 0
3 years ago
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