4 years ago

Write the arithmetic sequence that has four arithmetic means between -20 and 20.

1 answer:

8 0

Let the terms be

a , a+d, a+2d, a+3d, a+4d a + 5d

so a = -20
and a + 5d = 20

-20 + 5d = 20
5d = 40 so
d = 8

-20,-12,-4,4,12,20 is the required sequence.

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The ceiling of Katie’s living room is a square that is 15 ft long on each side. To decorate for a party, she plans to hang crepe

goldfiish [28.3K]

I think that 3 rolls is wrong and that 6 rolls is right. If you create a 15 by 15 square and draw two lines through the center that connect to the opposite corner, you'll be able to use the Pythagorean Theorem.

Perimeter: 15+15+15+15=60ft.

Length of Line from Corner to Corner:

(15)(15)+(15)(15)=C^2

225+225=C^2

450=C^2

21.2=C

21.2(2)= 42.4ft.

42.4ft.+60ft.= 102.4ft.

102.4ft. divided by 20ft. = 5.12 = <u>6 rolls</u>

8 0

3 years ago

Braiist can someome pls explain i dont know