(a) 3x=4(x-2.25) (or simplified: 3x=4x-9)
(b) 3x=4x-9
0=x-9
x=$9
(c) 3x9=27
4x9=36
36-9=27
and 27=27 therefore they spent the same and it is correct
(d) Tanya's items cost $9 each and Tony's items cost $2.25 less than this, or $6.75
8 less than a number can be written as
x-8
when you see the word <u>is</u> you should think of = sign
so the equation will be x-8=24
Now solve adding 8 to both sides.
x=24+8
x=32
B x h = a
11 x h = 132
h = 132/11
h = 12 cm
The area of the resulting two-dimensional cross section with the dimensions shown in the figure can be determined by simply using the formula for the area of a rectangle.
Given:
Length = 12 mm
Width = 7 mm
Area = L x W
Area = 12 mm x 7 mm
Area = 84 mm^2
Answer:
DE = 4 1/2
EF = 3 3/4
Step-by-step explanation:
AB/AC = DE/DF
6/4 = DE/3
cross-multiply:
4DE = 18
DE = 18/4 or 4 1/2
AB/BC = DE/EF
6/5 = 4.5/EF
cross-multiply:
6EF = 22.5
EF = 3.75
