Please, please, please, please help!?! I need my question answered to pass this quarter. Given f^-1(x)=-3/4+2, which equation represents f(x)?
(0,-3) see attached graph
step-by-step explanation:
a. to solve the system, graph the two equations.
x = y+3 becomes y=x-3 has m=1/1 and b=-3. start at (0,-3) on the y-axis and plot a point. then move up 1 unit and 1 unit to the right. plot a point and connect.
y=-4x+3 has m =-4/1 and b=-3. start at (0,-3) on the y-axis and plot a point. then move down four units and to the right 1 unit. plot a point and connect.
the solution is the point (x,y) where the two lines intersect. by the graph below it is (0,-3).
b. to solve by substitution, substitute y = -4x-3 into x= y+3
x= (-4x-3) +3
x=-4x
5x=0
x=0
now substitute x = 0 back in to find y.
y= -4(0)-3
y=0-3
y=-3
solution is (0,-3)
c. use elimination by adding the equations together.
x-y=3
4x+y=-3
5x=0
x=0
then substitute into one equation to find y.
y=-4(0)-3
y=-3
37/3
step-by-step explanation:
step 1: simplify both sides of the equation.
7x+8(x+
1
4
)=3(6x−9)−8
7x+(8)(x)+(8)(
1
4
)=(3)(6x)+(3)(−9)+−8(distribute)
7x+8x+2=18x+−27+−8
(7x+8x)+(2)=(18x)+(−27+−8)(combine like terms)
15x+2=18x+−35
15x+2=18x−35
tep 2: subtract 18x from both sides.
15x+2−18x=18x−35−18x
−3x+2=−35
step 3: subtract 2 from both sides.
−3x+2−2=−35−2
−3x=−37
step 4: divide both sides by -3.
−3x
−3
=
−37
−3
x=
37
3