Help! I've looked for the answer and I haven't been able to find it! When I find something, I doubt that people use exponents because it isn't marked when people ask!!! Part A: Explain why the x-coordinates of the points where the graphs of the equations y = 2^−x and y = 4^x + 3 intersect are the solutions of the equation 2^−x = 4^x + 3. (4 points)

Part B: Make tables to find the solution to 2^−x = 4^x + 3. Take the integer values of x only between −3 and 3. (4 points)

Part C: How can you solve the equation 2^−x = 4^x + 3 graphically?

the equation for this situation is y=122+45. to solve the equation you would add 45 and 122 to get a total of 167lbs. in conclusion, grace's weight eight weeks ago was 167lbs.  

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.

if you was gonna solve for a, a is a   < -12