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4 years ago

Expression for twice a number W, increased by 12

Mathematics

2 answers:

Montano1993 [528]4 years ago

5 0

Should be 2w + 12. Could be wrong because it’s been a while lol

zhenek [66]4 years ago

5 0

2w+12
you multiply w by 2 and then add 12, the equation can’t be answered without the value of w

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The perimeter of a square is 75 inches. What is the length of one side of the square?

BaLLatris [955]

Answer:

18,75

Step-by-step explanation:

A square has 4 sides, and each one of them are equal, so 75 divided by 4 its equal to 18,75

8 0

4 years ago

Read 2 more answers

1 , 3 , 6 , 10 , 15

Bas_tet [7]

First difference,

$\Delta_{1} = a_{2} - a_{1} = 3 - 1 = 2 = 1 + 1$

Second difference,

$\Delta_{2} = a_{3} - a_{2} = 6 - 3 = 3 = 2 + 1$

Third difference,

$\Delta_{3} = a_{4} - a_{3} = 10 - 6 = 4 = 3 + 1$

And so on.

Assuming the pattern holds on, we see that

i-th difference,

$\Delta_{i} = a_{i + 1} - a_{i} = i + 1$

$\implies a_{i + 1} = a_{i} + i + 1$

Then, nth term is,

$\implies a_{n} = a_{n - 1} + n$

$= a_{n - 2}+ (n + (n - 1))$

$= a_{n - 3} + (n + (n - 1) +(n - 2))$

$= a_{n - (n - 1)} + \sum \limits^{n - 2}_{k = 0}(n - k)$

$= a_1 + \sum \limits^{n - 2}_{k = 0}n- \sum \limits^{n - 2}_{k = 0}k$

$= a_1 +n(n -2 + 1 )- \frac{1}{2} (n - 2)(n - 1)$

$= a_1 +n(n -1 )- \frac{1}{2} (n - 2)(n - 1)$

$= a_1 +(n -1 )(n- \frac{1}{2} (n - 2))$

$= a_1 + \frac{1}{2} (n -1 )(2n- n + 2)$

$= a_1 + \frac{1}{2} (n -1 )(n + 2)$

$\implies a_{n} = 1 + \frac{1}{2} (n -1 )(n + 2)$

Now, the 21st term in the sequence is,

$\implies a_{21} = 1 + \frac{1}{2} (21 -1 )(21 + 2)$

$= 1 + \frac{1}{2} \times 20 \times 23$

$= 231$

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3 years ago

If x = 10 when y = 320<br> then what is y then x is 1/2?

miv72 [106K]

Answer:

y = 16

Step-by-step explanation:

if x =10 then y =320

that means y= 32x

so if x = 1/2

y = 32*1/2

y= 16

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3 years ago

Y = 3x – 13<br> 3x – 4y = 7

julsineya [31]

What are you solving for?

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3 years ago

Sales tax is 6%. Bought car for$820 what was cost of car

pogonyaev

820 + .06(820)
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4 years ago

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