(HELP QUESTION ON MY EXAM) Fifty years from now, when historians want to learn about life in 2020, what are two primary sources and two secondary sources that they could use to learn about this time?

photos and videos

Explanation:

primary sources come directly from the source, so news articles would be good sources. Photos and videos do come directly from the source, as well as documents and speeches.

hr2520 is the patient's act. there is required the secretary of health to summon a committee to develop a national strategic plan of prevention. this committee has forth provisions that make possible for the govern entities to acquire private health insurance services.

is easier to keep this hr2520 as federal, because that way the secretary of health has centralized power to deal with private insurance companies and the federas government has more ways and power to negotiate with them, than doing this process state by state in their specific terms.

the perimeter of a triangle is 69 cm. side a is 5 cm shorter than side b. side c is twice as long as side a. find the length of each side. i need to know how to do it in 2 equations.  

equations:

a = b-5

c = 2a

a + b + c = 69