Linear equation - One variable. 1  A linear equation in one unknown x may always be rewritten. 2  If a â  0, there is a unique solution. 3  If a = 0, then, when b = 0 every number is a solution of the equation, but if b â  0 there are no solutions (and the equation is said to be inconsistent.)
How effective is the Depo shot? The birth control shot â Depo-Provera â is one of the most effective methods of birth control available. Each shot of Depo-Provera will protect you from pregnancy for 12 weeks. It works best when you get the birth control shot regularly, every 12 weeks. Fewer than one out of 100 women will get pregnant each year if they always use the birth control shot as directed. About six out of 100 women will get pregnant each year if they donât always use the birth control shot as directed.
The depo shot is a method of contraception for women. The shot contains a hormone that is similar to progesterone. The shot can only be administered by your doctor, and is injected in the buttocks or arm. Shots are effective for 12-14 weeks, but women are advised to get the shot every 12 weeks for maximum protection. Depo-Provera can start working immediately if you get the shot within the first five days of your period. As a hormonal contraceptive, the depo shot suppresses ovulation.