Three times the product of 5 and $4.95

Which expression is equal to (f+g)(x)?

What is the value of the discrimination for the quadratic equation 0=×2+2+×2

Acentral angle measuring 160 degrees intercepts an arc in a circle whose radius is 4. what is the length of the arc the circle formed by this central angle? round the length of the arc to the nearest hundredth of a unit. a) 4.19 units b) 6.28 units c) 12.57 units d) 12.57 square units