In △abc, ∠a ≅ ∠c. if ab = 4x + 25, bc = 2x + 45, and ac = 3x − 15, determine the length of side ab.

Asap! i'm not good math and i'm lost.

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?

Select the conic section that represents the equation. 3x2 + 3y2 -2x + 4 = 0