Area = (x - 5)(x – 7)
Area = x(x - 7) - 5(x - 7)
Area = x^2 -7x -5x + 35
Area = x^2 -12x + 35
algebraic expression that represents its area: x^2 -12x + 35
x^2 - 12x + 35 = 195
x^2 - 12x + 35 - 195 = 0
x^2 - 12x - 160 = 0
x^2 - 8x - 20x - 160 = 0
x (x + 8) - 20 (x + 8) = 0
(x + 8) (x - 20) = 0
(x + 8) = 0
(x - 20) = 0
x = - 8 (not a solution)
x = 20
hence,
length = x - 5
length = 20 - 5
length = 15 m
width = x - 7
width = 20 - 7
width = 13 m
perimeter = 2(13) + 2(15)
perimeter = 26 + 30
perimeter = 56 m²
Answer:
11 m and 7 m
Step-by-step explanation:
Width = x
Length = x+4
P=2L+2W
P=2(x+4) + 2x=4x +8
36 = 4x + 8
4x = 28
x=7 Width
x+4=7+4=11 Length
A baby gets 1 ml of vitamins every day. If you would like to know how many weeks will a 50 ml bottle last, you can calculate this using the following steps:
50 ml / 1 ml = 50 days
50 days / 7 days = 50 / 7 = 7.14 weeks
Result: A 50 ml bottle will last for about 7 weeks.
