Which equation is correct regarding the measure of ∠1?
m∠1 = One-half(a – c)
m∠1 = One-half(a + c)
m∠1 = One-half(b – d)
m∠1 = One-half(b + d)

Using the quadratic formula find the zeros of the given polynomial -5x^2+3x-11

Abarbecue sold 26 hamburgers and hot dogs. hamburgers sell for $3.50 each and hot dogs sell for $2.00 each. if the barbecue made $70 in sales, determine and state the number of hot dogs sold.

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle