I really need help on this. You don’t have to but if you can help it’s greatly appreciated and I will mark you brainliest!!

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth. x^2 - 23 = 10x a. -1.93, 11.93 b. 1.93, -11.93 c. 1.93, 11.93 d. -1.93, -11.93