Cho tam giác abc cân tại a . Gọi e , f lần lượt là trung điểm của ab , ac . Cm rằng tứ giác becf là hình thang cân

What is the measure of ac? 5 units 13 units 26 units 39 units

Answer this question! 30 points and brainliest!

Each month, a shopkeeper spends 5x + 14 dollars on rent and electricity. if he spends 3x−5 dollars on rent, how much does he spend on electricity? for which value(s) of x is the amount the shopkeeper spends on electricity less than $100? explain how you found the value(s).