Patty says that if you add the same negative integer five times, the sign of the sum is negative and its size is five times the size of the original integer. For example:
(-7) + (-7) + (-7) + (-7) + (-7)
= 5 x (-7)
= - 35

Is Patty’s statement true for all integers?

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this