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Pavel [41]
4 years ago
6

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

4 0
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

4 0
3 years ago
Y = 3x – 13<br> 3x – 4y = 7
julsineya [31]
What are you solving for?
8 0
3 years ago
Sales tax is 6%. Bought car for$820 what was cost of car
pogonyaev
820 + .06(820)
820 + 49.2
869.2
The cost of the car is $869.20.
8 0
4 years ago
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