Evaluate when a=7 and x = -5 -a+3x

Mathematics

2 answers:

Tema [17]4 years ago

6 0

A = 7 and x = -5

-a + 3x = -(7) + 3(-5) = -7 -15 = -22

Answer: -22

luda_lava [24]4 years ago

5 0

Hello there!

a = 7 and x = -5

-a + 3x

We gonna replace each letters by the number given for them...

-7 + 3(-5)

= -7 - 15

= -22

Let me know if you have any questions As always, it is my pleasure to help students like you!

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Answer:

FH = 34
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Step-by-step explanation:

EI = IG . . . . . . . . . . . .diagonals of a rectangle bisect each other

2x +7 = 6x -13 . . . . . substitute given expressions

20 = 4x . . . . . . . . . . add 13-2x

5 = x . . . . . . . . . .. . . divide by 4

EI = 2x+7 = 2·5 +7 = 17

FH = 2·EI = 2·17

FH = 34

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Answer:

The smoothing constant alpha is 0.20 (Option a)

Step-by-step explanation:

To solve this problem, first we write the succession of the simple exponential smoothing:

$s_t=\alpha x_t+(1-\alpha)s_{t-1}$

Where s(t) is the forecast for period t, s(t-1) is the forecast for period (t-1), xt is the real demand for period t, and alpha is the smoothing constant.

All but the alpha constant are known

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Then, we can calculate alpha as:

$s_t=\alpha x_t+(1-\alpha)s_{t-1}\\\\109.2=\alpha*106+(1-\alpha)*110\\\\109.2=(106-110)\alpha+110\\\\(110-106)\alpha=110-109.2=0.8\\\\4\alpha=0.8\\\\\alpha=0.2$