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kogti [31]
4 years ago
7

Solve –2.8(z + 1) – (3.5z – 9) = –31.6 for z. A. –1.32 B. 0.94 C. 6 D. –7.72

Mathematics
1 answer:
andreyandreev [35.5K]4 years ago
4 0

Answer:

z=6

Step-by-step explanation:

-2.8\left(z+1\right)-\left(3.5z-9\right)=-31.6

-6.3z+6.2=-31.6

-6.3z+6.2-6.2=-31.6-6.2

-6.3z=-37.8

\frac{-6.3z}{-6.3}=\frac{-37.8}{-6.3}

z=6

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3 years ago
Thats it, ima be also posting more if i dont get the question
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The equation of this straight line is y = 50x + 100.

<h3>What is a linear function?</h3>

A linear function can be defined as a type of function whose equation is graphically represented by a straight line on the cartesian coordinate.

<h3>How to determine the equation?</h3>

In order to determine the equation from this graph of a linear equation, we would find the slope of the straight line by using this formula as follows:

Slope,\;m = \frac{Change\;in\;y\;axis}{Change\;in\;x\;axis}\\\\Slope,\;m = \frac{y_2\;-\;y_1}{x_2\;-\;x_1}

Slope, m = 100/2

Slope, m = 50.

Mathematically, the standard form of the equation of a straight line is given by;

y = mx + c

Where:

  • x and y are the points.
  • m is the slope.
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At point (4, 300), we have:

y = mx + c

300 = 50(4) + c

300 = 200 + c

c = 300 - 200

c = 100.

Therefore, the equation of this straight line is y = 50x + 100.

Read more on slope here: brainly.com/question/28312822

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5 0
1 year ago
Suppose the wait to pass through immigration at JFK Airport in New York is thought to be bell-shaped and symmetrical with a mean
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Answer:

6 minutes

Step-by-step explanation:

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