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Brock2002
13.11.2020 •
Mathematics
Joan can mow a 10-acre field in 4 hours. How long would it take her to mow a 8-acre field?
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Ответ:
Step-by-step explanation:
10/4=2.5
8/2.5=3.2
3.2 hours
Ответ:
c) y= 2x +4
Step-by-step explanation:
Slope-intercept form:
y= mx +c, where m is the gradient and c is the y-intercept.
Parallel lines have the same gradient.
Gradient of given line= 2
m= 2
y= 2x +c
To find the value of c, substitute a pair of coordinates into the equation.
when x= -1, y=2,
2= 2(-1) +c
2= c -2
c= 2 +2
c= 4
Thus, the equation of the line is y= 2x +4.