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3 years ago

Please help me! i don't know how to work this out.

Mathematics

1 answer:

crimeas [40]3 years ago

6 0

Answer:

21, 24, 29

Step-by-step explanation:

The first term is when n = 1.

(1)² + 20 = 21

The second term is when n = 2.

(2)² + 20 = 24

The third term is when n = 3.

(3)² + 20 = 29

To find how many terms are less than 50, set n² + 20 equal to 50 and solve for n:

n² + 20 = 50

n² = 30

n ≈ 5.477

Rounding down, n = 5 is the last term that is less than 50.

Therefore, there are 5 terms in the sequence that are less than 50.

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How wide is a 3 ft doorway in a 1/4 inch scale drawing?

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Answer:

9 inches

Step-by-step explanation:

Convert from feet to inches by multiplying by 12:

3*12 = 36

Multiply by the scale factor of 1/4:

36*1/4 = 9

9 inches

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1 year ago

2.If the average American lives about 80 years (or about 30,000 days), how

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3 years ago

What is the smallest solution to the equation 3x<img src="https://tex.z-dn.net/?f=%20x%5E%7B2%7D%20" id="TexFormula1" title=" x^

topjm [15]

IF you mean $3 x^{2} -16=131$ , then the following would be a solution:

First add 16 to both sides of the equation:
$3 x^{2} = 147$

Now divide both sides of the equation by 3:
$x^{2} =49$

Take the square root of both sides to solve for "X", or simply solve by inspection: "what number(s) can be squared to get 49?"

Answer: -7 and 7 So the smallest solution would be "-7"

6 0

3 years ago

What the answer to this -3+u=-20

yawa3891 [41]

- 3 + u = - 20

u = - 20 + 3

u = -17

hope this helps!.

5 0

3 years ago

Read 2 more answers

1/3(x - 10) = - 4 x = ?

ki77a [65]

Answer:

x = -2

Step-by-step explanation:

1/3(x - 10) = - 4

1/3x - 10/3 = - 4

1/3x = -4 + 10/3

1/3x = -2/3

x = -2/3 · 3

x = -2

7 0

2 years ago

Read 2 more answers