For a science project, Billy observed a chipmunk and a squirrel stashing acorns in trees. The chipmunk hid 3 acorns in each tree. The squirrel hid 4 acorns in each tree. They each hid the same number of acorns, although the squirrel needed 2 fewer trees. You are going to investigate the number of acorns that each animal hid.

-2 is the right

so, converting firstly the mixed fractions to improper fractions and then "adding".

11.2

step-by-step explanation:

when doing tangent the tangent of the angle is equal to the opposite side from the angle over the adjacent side to the angle.

tan43 = x / 12

move 12 over by multiplying each side by 12

12tan43 = x

x = about 11.2

d. 145*2 is 290 than the total angle is 360 then minus 290 then divide by two