Need help with A and B would be perfect with an explanation (not necessary)

Mathematics

1 answer:

sattari [20]3 years ago

6 0

Answer:

a) 54.5

b) 55.4

Step-by-step explanation:

error intervals - 54.5 is the lowest number that can round to 55, and 55.4 is the highest because 55.5 would round to 56

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alexandr402 [8]

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Step-by-step explanation:

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The graph of the equation y=−5x+b goes through the point A(5, −2). Find the value of b.

Furkat [3]

$\bf y=-5x+b\impliedby \begin{array}{|c|ll} \cline{1-1} slope-intercept~form\\ \cline{1-1} \\ y=\underset{y-intercept}{\stackrel{slope\qquad }{\stackrel{\downarrow }{m}x+\underset{\uparrow }{b}}} \\\\ \cline{1-1} \end{array}\qquad \qquad \stackrel{therefore}{m=-5} \\\\[-0.35em] ~\dotfill\\\\$

$\bf A(\stackrel{x_1}{5}~,~\stackrel{y_1}{-2})~\hspace{10em} slope = m\implies -5 \\\\\\ \begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-(-2)=-5(x-5)\implies y+2=-5x+25 \\\\\\ y=-5x+25-2\implies y=-5x+\stackrel{\stackrel{b}{\downarrow }}{23}$