Answer:
Length = 16.3 in and Width = 12.3 in
Step-by-step explanation:
Let's name L the length and W the width of the rectangle. We can then write equations describing the statements given:
"<em>the length of a rectangle is 4 more than the width</em>"
L = W + 4
"<em>the perimeter of the rectangle is 57.2 inches</em>"
2 L + 2 W = 57.2
(where we used the formula for the perimeter of the rectangle equal to twice the rectangle's length plus twice the rectangle's width)
Now we use the first equation to substitute for L in the second one:
2 ( W + 4) + 2 W = 57.2
use distributive property to remove parenthesis
2 W + 8 + 2 W = 57.2
combine like terms
4 W + 8 = 57.2
subtract 8 from both sides
4 W = 57.2 - 8 = 49.2
divide both sides by 4 to isolate W
W = 49.2 / 4 = 12.3 in
Now we use this result in the first equation we wrote, to find L
L = W + 4 = 12.3 + 4 = 16.3 in
Therefore : Length = 16.3 in and Width = 12.3 in
Answer:
1.425.
Step-by-step explanation:
1 .425 is the only one which can be written as a fraction ( 1425/ 1000).
π is a non repeating decimal which goes on without bounds.
So is √50 (try entering it on your calculator).
√-4 : there is no real number whose square root is negative.
<span>17 x X = A, i think.</span>
Answer:
Amount of money paid by each student is equal to 
Step-by-step explanation:
Given: A group of children bought 
presents that cost 
each and a card that cost 
.
To find: amount of money each student paid in terms of 
Solution:
Cost of each present 
Cost of presents 
Cost of a card 
Therefore,
Amount of money paid by each student in terms of = Cost of presents + Cost of a card
Answer:
3 x $10.50 = $31.50
Step-by-step explanation:
$10.50 + $10.50 + $10.50 = $31.50
$10.00 + $10.00 + $10.00 = $30.00
$0.50 + $0.50 + $0.50 = $1.50
$30.00 + $1.50 = $31.50
