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larisa [96]
2 years ago
10

Jennifer and Callie are training for a marathon. Jennifer has run m miles, and Callie has run 3 times as many as Jennifer. The e

xpression shows how many miles they have run altogether.
m + 3m
Mathematics
2 answers:
galben [10]2 years ago
4 0
What’s the question,
Gnom [1K]2 years ago
4 0
Yeah it’s kinda hard to understand
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A line with a slope of –2 passes through the point (–4, 8). What is the equation of the slope-intercept form?
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Answer:

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Step-by-step explanation:

The equation of a line is usually written in the form of y=mx+c, where m is the gradient and c is the y-intercept.

Given that the slope is -2, m= -2.

subst. m= -2 into the equation:

y= -2x +c

To find the value of c, substitute a coordinate.

When x= -4, y=8,

8= -2(-4) +c

8= 8 +c (expand)

c= 8-8 (-8 on both sides)

c=0 (simplify)

Thus, the equation of the line is y= -2x.

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