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3 years ago

What are the first four terms of the sequence: f(n) = 3n(n+3)

1 answer:

8 0

First four terms would be n = 1, 2, 3, 4

f(1) = 3 ( 1 )( 1 + 3 )
= 3 * 4
=12
f(2) = 3 ( 2 )( 2 + 3 )
= 6 * 5
= 30
f(3) = 3 ( 3 )( 3 + 3 )
= 9 * 6
= 54
f(4) = 3 ( 4 )( 4 + 3 )
= 12 * 7
= 84

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So what's the answer for 35% of 22

kondor19780726 [428]

You divide 22 by 10 (2.2) and then multiply that by 3 to get 30%, which is 6.6. Then, you divide 2.2 by 2 to get 1.1, which is 5%. After this you just add them up to get the answer as 7.7.
Also, if you have q calculator, you can do it the short way and do 22 × 0.35 = 7.7

8 0

3 years ago

Read 2 more answers

Please help me with this one I don’t understand. I need help with #20 thank you!

dimaraw [331]

part A)

we know that for every 1000 ft the temperature drops by 1.3.

so after 1000ft up it went down by 1.3(1)

2000ft up it went down by 1.3(2) or 2.6

3000ft up it went down by 1.3(3) or 3.9

after 10000 up it went down by 1.3(10) or 13.

part B)

well, the current temperature on the ground where the plane is sitting is -2.8°F, after 10000ft it dropped by 13°, so the temperature will just be -2.8 - 13 = -15.8°F.

8 0

4 years ago

What is the circumference of a circle with a diameter of 7 inches? (use for pi)

Marrrta [24]

Answer:

21.9

Step-by-step explanation:

circumference = pi x diameter

3.14 x 7 = 21.9

3 0

4 years ago

Read 2 more answers

The square on the right is a scaled copy of the square on the left. Identify the scale factor. Express your answer in simplest f

zhannawk [14.2K]

Answer:

x = 21/8

Step-by-step explanation:

So 8 is being multiplied by something to get to 21

So 8x = 21

Solve for x:

8x = 21
x = 21/8

-Chetan k

7 0

2 years ago

The figure below has a perimeter of 20 cm. Jinaiya wants to scale this figure by a factor of 0.75

Dmitrij [34]

Answer:

15cm

Step-by-step explanation:

scale factor =image diatace/object distance

0.75=x/20

0.75×20=x

15=x

: .x=15cm

4 0

3 years ago