y = mx + b
m = slope
y = -2x+b
when y = 0, x = -3
0 = -2(-3)+b
b = 6
y = -2x +6
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An equation is equal if you have a math problem on each side of an equal sign.
A circle is the locus of all points equidistant from a fixed point on the plane. The fixed point is called the centre of the circle and the equal distance is called the radius of the circle. We can derive the equation of the circle from the distance formula. Let O be the centre of the circle and r be the radius of the circle. Here the centre = Origin = (0, 0) and the radius = r units. The distance r = sqrt ((x-0)2 + (y-0)2) r = sqrt (x2 + y2) Squaring both the sides, we get x2 + y2 = r2 This is the equation of the circle with centre as Origin. If the centre point is some (h, k), then use the distance formula to find the radius r. The distance r = sqrt ((x-h)2 + (y-k)2) Squaring both sides, we get (x-h)2 + (y-k)2 = r2. This is the equation of the circle with centre as the point (h, k).
To determine the distance when time is equal to 15, we need a specific equation or context, such as speed or rate of travel. For example, if the speed is constant at 5 units per time unit, the distance would be calculated as distance = speed × time, resulting in a distance of 75 units. Without additional information, the distance cannot be accurately determined.
If it doesn't have an equal sign, then it's not an equation.
An expression has no equal sign whereas an equation does have an equal sign