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lara [203]
1 year ago
15

If an arithmetic sequence has a 10th term of 17 and a 14th term of 30. find the common difference (d).

Mathematics
1 answer:
stellarik [79]1 year ago
3 0

Answer:

common difference is 13/4

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I need help with math it’s urgent thanks
Artemon [7]

Answer:

(1, 3)

Step-by-step explanation:

 2x + 3y =  11      ------------(i)

-4x + 2y = 2        ------------(ii)

Multiply equation (i) by 2.

(i)*2              4x + 6y = 22

(ii)               <u>-4x  + 2y = 2</u>                  {Now add and x will be eliminated}

                            8y = 24

y= 24/8

y = 3

Plugin the value of y in equation (i)

2x + 3*3 = 11

2x + 9 = 11

2x = 11-9

2x = 2

x = 2/2

x = 1

8 0
2 years ago
An amphitheater was 19 seats in the front row, 22 in the second, 25 in the third, and so on, for 24 rows
Scorpion4ik [409]

Answer:

Answer: 572

Step-by-step explanation:

5 0
3 years ago
Given: △ABC; AB=BC, m∠BDA = 60°, BD=4 cm, BD ⊥ BA . Find: DC, AC.
vekshin1

Answer:

DC = 10.93 cm ,  AC = 9.8 cm

Step-by-step explanation:

From trigonometry;

⇒ Tan 60 = AB/BD

⇒AB = BD Tan 60 ( where BD = 4 cm )

⇒ AB = 6.93 cm

Also, AB=BC , therefore;

⇒ BC = 6.93 cm

⇒ Cos 60 = BD/AD

⇒ AD = BD/ Cos 60 = 4/Cos 60

⇒ AD = 8 cm

From Pythagoras theorem;

⇒ AC^{2} = AB^{2} + BC^{2} = (6.93)^{2} + (6.93)^{2}

⇒ AC = \sqrt{96.05} = 9.80 cm

⇒ DC = BD + BC = 4 + 6.93

⇒ DC = 10.93 cm

8 0
2 years ago
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Lubov Fominskaja [6]

Answer:

B. Negative

⁄(⁄ ⁄•⁄ω⁄•⁄ ⁄)⁄

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Step-by-step explanation:

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2 years ago
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