Write the standard form of the line that contains a y-intercept of -3 and passes through the point (3, 0). include your work in your final answer.

Ahiker stands at an unknown elevation before he ascends 2 miles up a mountain to an elevation of 9 miles. find the elevation of the hiker before his ascent.

The distance of a chord from the centre of a circle is 12cm and the lenght of the chord is 10cm. find the radius of the circle

Extra points! find the missing dimension! need asap