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bricklayer is building a garden retaining wall. 5 hours into the second day she stacked 850 bricks. 9 hours into the second day she stacked 1330.

How many bricks does she stack per hour?
How many bricks had been stacked on the first day?
(No picture provided)

Sagot :

  • (5,850)
  • (9,1330)

Rate of change=Slope:-

[tex]\\ \tt\hookrightarrow m=\dfrac{1330-850}{9-5}=\dfrac{480}{4}=120[/tex]

  • 120bricks/hour

Equation in point slope form

[tex]\\ \tt\hookrightarrow y-850=120(x-5)[/tex]

[tex]\\ \tt\hookrightarrow y-850=120x-600[/tex]

  • Convert to slope intercept form

[tex]\\ \tt\hookrightarrow y=120x+250[/tex]

  • 250 bricks stacked on the first day
TheRunner2019

Answer:

How many bricks does she stack per hour?  480

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