bravoy
22.10.2019 •
Mathematics
The length of albert's rectangular are listed below.
length- 40 feet
width- 20 feet
the perimeter of tony's rectangular backyard is 2.5 times the perimeter of albert's backyard. which of the following best represents tony' backyard?
a. length-100 feet width- 50 feet
b. length- 16 width-20
c. length- 100 width-20
d. length-50 width- 25
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Ответ:
Albert's Perimeter = 2(l+w) = 2(40+20) = 2(60) = 120 ft.
Tony's Perimeter = 120 ft * 2.5 = 300 ft
Tony's length = 40 ft * 2.5 = 100 ft
Tony's widht = 20 ft * 2.5 = 50 ft
To check tony's perimeter:
P = 2(l + w) = 2 (100 + 50) = 2 (150) = 300 ft.
Ответ:
a)First, solve and regroup
11=y-5x
y=11+5x.
Plug in:
6x-2(5x+11)=-6
6x-10x-22=-6
-4x-22=-6.
-4x=16
x=-4.
Plug it:
y=11+5(-4)
y=11-20
y=-9.
x,y=-4,-9.
b) The error Tim made is that he confused the x and y.
The correct answer is -4,-9.
He said it was -9,-4.
Hope this helps plz hit the crown ;D