Semi annually means how many times a year?

If the slope of one line equals the slope of another line then ? a) the two lines are intersecting lines b) the two lines are perpendicular lines c) the two lines are parallel lines d) the two lines always have very steep slopes

Aline has a slope of and a y-intercept of –2. what is the x-intercept of the line?

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?