с+с+с=46+с,Решите уравнения!!!

решите пожалуйста: Кубик подвешен, как показано на рисунке. Коэффициент трения о стенку . При каких углах  кубик будет в равновесии?

Put the verbs in brackets in the Present Simple, Present Continuous, Past Simple or Past Continuous 1. What ____________you ______________(look) at? –Some photos I __________(take) when I _____________(be) on holidays. 2. I _______________(be) sorry, but I ______________(not understand) what you _____________(mean). 3. What ___________Jane_____________(do)? – She ______________(be) a teacher, but she ______________(not teach) at the moment. 4. He never _____________(smoke) and ___________usually __________(not eat) meat. 5. Last time I _____________(go) abroad was when I ______________(go) to London. We _____________(stay) in London for three days. On the first day when I ______________(do) the sights, I _____________(meet) my old friend. He ___________just______________(go) to his hotel when we ___________(come) across. 6. ___________you ____________(often, go) to the gym? – I _______________(not go) much at the moment, I ____________(not have) time. I ____________(be) too busy these days. But I ___________(want) to go to the gym next week. 7. Tomorrow Kate _____________(visit) her aunt, that’s why now she _____________(make) a cake. It _____________(smell) delicious! When Kate ____________(visit) her aunt last week, she _______________(buy) some pastries from the baker’s, but they _____________(not be) that good.

В 3 ящиках 18 кг мандаринов . Во втором ящике на 1,05 больше , чем в первом , а в третьем - на 0,7 кг больше , чем во втором . На сколько кг в 3 ящике больше ,чем в первом ?

какие жизненные формы характерны для растений отдела плауновидные