Find the polar coordinates in the usual way, then negate r and add 180° to θ.
You know that
... r = √(x² + y²)
... θ = arctan(y/x) . . . . . taking quadrant into account
The coordinates (r, θ) and (-r, θ+180°) specify the same point.
Answer:
3(3+7)
Step-by-step explanation: you factor out the greatest common multiple. 3 times 3 is 9 and 3 times 7 is 21
Answer:
to estimate the sum you round to the closest number like 38 is closest to 40 so you just say you total is $40.00
difference is when say you have 30 dollars and you spend 10 the difference is 10 dollars
Expression: 2500 + m
Just substitute m with 300 and solve like that.
2500 + 300 = 2800
Step-by-step explanation:
the point-slope form is
y - y1 = m(x - x1)
with (x1, y1) being a point on the line.
so, we have here
y - 4 = 0×(x - -4) = 0
therefore, the resulting equation (which is automatically in slope-intercept form) is
y = 4
this is a flat, horizontal line that passes through (0, 4) on the y-axis, and of course, through (-4, 4), as the y value is 4 for every possible value of x.
