Answer:
Step-by-step explanation:
The given function is
f(x) = 4x
As we know
f(x) = y, which implies x= 
Therefore,
y = 4x
x = 
as x=
So,
replacing y by x in the above expression
So our inverse function is
Answer:
x = 4/7
Step-by-step explanation:
5/3 x = 20/21
Multiply by 3/5 on each side to isolate x
3/5 *5/3 x = 20/21 * 3/5
x = 20/21 * 3/5
Rewriting the right hand side
x = 20/5 * 3/21
x =4 * 1/7
x = 4/7
The correct answer is 10/7 or 1 3/7. Hope this helps.
Answer:
5unit
Step-by-step explanation: since area of rectangle = length*width
Here length is (x+2) and width is(2x+3)
(x+2)(2x+3)=91
On further solving
2x^2+75x-85=0
2x^2-10x+17x-85=0
2x(x-5)+17(x-5)=0
(2x+17)(x-5)=0
x=5unit
Answer:
x = 32
Step-by-step explanation:
∠BCA = ∠DBA (90 - ∠DBC)
∠A = ∠A
ΔABD similar to ΔACB
AC/AB = AB/AD
x / 8 = 8 / 2
x = 32
