Answer:
2x + 10
Step-by-step explanation:
Perimeter is the addition of all the sides
x-2+x+3x+1=2x-5+x+4+6x-7; since their perimeters are equal
5x-1=9x-8
collect the like terms
-1+8=9x-5x
7=4x
x=7/4
x=1.75
Answer:
The height of the hill = h = 580.7 feet
Step-by-step explanation:
Let height of the hill = h
From the triangle A B D
Tan 22 = 
⇒ AB = h & B D = y + 700
⇒ Tan 22 =
------------(1)
From triangle ABC
Tan 38 = 
⇒ AB = h & BC = y
⇒ Tan 38 =
------------------(2)
⇒ h = y tan 38 -----------------(3)
Put the value of h from equation (3) into equation (1) we get
⇒ (tan 22) × (y + 700) = y × tan 38
⇒ 0.40 y + 282.82 = y × 0.78
⇒ y = 742.12 feet -----------------(4)
Put this value of y in equation 3 we get
⇒ h = 742.12 × tan 38
⇒ h = 580.7 feet
This is the height of the hill.
This answer is not confirmed to be correct:
$456 is the total amount so it would be on one side of the equal sign.
$456 = $75.00 + 9.50x.
I hope this helps!