if tan theta is equal to 1 by 7 and tan beta equal to 1 by 3 proof that cos 2 theta is equal to sin 4 theta​

Which of the following system of equation is not equal to the system of equations is not equal to the system of equations shown below

Danielle has $127.02 in her account before making any transactions. over the course of a week, danielle makes the following transactions: transaction debit ($) credit ($) birthday check 75.00 night out 66.14 garage sale proceeds 121.58 charitable donation 42.25 doctor’s appointment 115.30 at the end of the week, how much money is in danielle’s account? a. $99.91 b. $27.11 c. $184.41 d. $142.16 select the best answer from the choices provided a b c d

Part a : solve - vp + 40 < 65 for v . part b : solve 7w - 3r = 15 for r show your work!