4 years ago

The answer of 1−2(1+3x−2(x+2)+3x)=−1?

Mathematics

1 answer:

k0ka [10]4 years ago

4 0

Answer:

-8x + 7

Step-by-step explanation:

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What is the equation of the line best fit for the following data? Round the slope and y-intercept of the line to three decimal p

kari74 [83]

Answer:

$y=1.383x-1.526$

Step-by-step explanation:

The given data table is

x : 4 7 10 12 13

y : 5 7 12 14 18

We need to find the equation of the best fit line.

The general form of a best fit line is

$y=mx+b$ .... (1)

where, m is slope and b is y-intercept.

$m=\frac{\sum_{i=1}^nx_iy_i-n\overline{x}\overline{y}}{\sum_{i=1}^nx_i^2-n\overline{x}^2}$

$b=\overline{y}-b\overline{x}$

Using the graphing calculator we get

$m=1.38321\approx 1.383$

$b=-1.52555\approx -1.526$

Substitute m=1.383 and b=-1.526 in equation (1).

$y=1.383x-1.526$

Therefore, the equation of best fit line is $y=1.383x-1.526$ .

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4 years ago

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The function f(x) = 3x − 2 represents the altitude of a hot air balloon, where x is the time in minutes. The function g(x) = x2

cluponka [151]

Answer:

Step-by-step explanation:

If g(x) =x^2 -1, then

f[g(5)] = 3*(5^2-1) -2 =72-2= 70

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3 years ago

(3 - c^2d)(4 - 4c^2d) multiplying polynomials

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Is the exponent 2d? or is it (c^2)d?
if 2d, 7-16

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Which ordered pair must be a solution in the graph of the linear inequality

sweet [91]

Answer:

it is c and you also use something called desmos to help you with graphing questions

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Show that (3x+7)² -84x = (3x-7)

Lapatulllka [165]

First expand...

(3x+7)^2 = 9x^2+42x+49

Bring down -84x...

9x^2+42x+49-84x

Solve...

9x^2-42x+49

Factor...

(3x-7) (3x-7) = (3x-7)^2

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3 years ago