To find how many cm are in a ft, you have to use the method of unit rate:
so we know that 12 in. equals a ft. so,
1 ft
------
12 in.
and 2.25 cm equals an in. so,
1 in.
-------
2.54cm
then we put the rates together and get:
1ft 1 in.
---- X -------................we cancel out the in. units and get:
12 in. 2.54 cm
Solve and get 1 ft = 30.48 cm
Answer:
The angle of the figure is 90°
A = L * W
Given: The area of a rectangle is 70 m^2
L * W = 70
L = 3W - 11
Substitute L = 3W - 11 into L * W = 70
(3W - 11) * W = 70
3W^2 - 11W = 70
3W - 11W - 70 = 0
(3W + 10) (W - 7)= 0
3W + 10 = 0; W = -10/3 (Dimension can't be negative)
W - 7 = 0; W = 7
L = 3W - 11 = 3(7) - 11 = 21 - 11 = 10
Answer
Length: 10 m
Width: 7 m
Try this order:
2,1,5,6,4,3
that means to put the first tile in the second place of sequence.
