What is the result of this subtraction? 6.3−(4.9−7.8)=

ANSWER CHOCIES :
A
–3.4

B
–6.4

C
3.4

D
9.2

David must install fencing around a lot that is shaped like a right angle.the side of lot that runs east-west is 200 ft long.the side of the lot runs north-south is 125 ft long.calculate how many feet of fencing he will need to surround the entire lot.

Find dy/dx using implicit differentiation ln(20+e^xy)=y

Write an equation for the function that includes the points (1,4/5) and (2,2/3)