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0 less than or equal to x less than or equal to 20
Answer:
Perpendicular lines have slope that are negative reciprocals.
The slope of the perpendicular line is M = -1/3.
Step-by-step explanation:
(4,-1) --> X = 4, Y = -1, M = -1/3
y = Mx + b
-1 = (-1/3)*4 + b
-1 = (-4/3) + b
-3/3 = (-4/3) + b
-3 = -4 + 3b
1 = 3b
b = 1/3
y = (-1/3)X + 1/3
Answer:
Step-by-step explanation:
x(7x^2+4x) can be expanded by multiplying each of the two terms inside the parentheses by x:
x(7x^2+4x) = 7x^3 + 4x^2
