42.8 in
Step-by-step explanation:
Step one:
given data
we are told that the expression for the depth of a lake after x years is given by
Required
The value of y when x= 4
Step two:
substitute the value of x in the expression to get y
After 4 years the depth will increase by 42.8 in
Answer:
42
Step-by-step explanation:
14 = /3
3 ⋅ 14 = 3⋅ /3
x = 42
Answer:
length = 37 m
Step-by-step explanation:
let w be width then length = 2w - 7
The opposite sides of a rectangle are congruent
The perimeter is the sum of the 4 sides and is equal to 118 , then
w + w + 2w - 7 + 2w - 7 = 118 , that is
6w - 14 = 118 ( add 14 to both sides )
6w = 132 ( divide both sides by 6 )
w = 22
Then
length = 2w - 7 = 2(22) - 7 = 44 - 7 = 37 m
