Answer:
a. y = -2x + 7
Step-by-step explanation:
First, find the slope by plugging the points into the slope formula, 
, which equals -2. Then use the slope and the point (7,-7) to make an equation in slope-point form. y+7=-2(x-7), finally solve for y to get y=-2x+7.
To find the answer, use 
, and then use the equation 
To find it's half life.
Answer:
It should be C
Step-by-step explanation:
B is a quadratic function and A is a linear line.
Answer:
a
Step-by-step explanation:
the answer is a. 6 faces 12 edges and 8 vertices
