Question 7 (mandatory) (10 points)
which of these presidents died in office?
a. john quincy adams.
b. martin van buren.
c. abraham lincoln.
d. warren g. harding.
e. franklin d. roosevelt.
f. dwight d. eisenhower.
18
g. lyndon b. johnson.

E.

Explanation:

FDR died during the beginning of his fourth term.

the answer would be c

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