Answer:
a=7.75
Step-by-step explanation:
19 = 4a − 12. 19+12=31. 31/4=7.75
Answer:
5 feet & 15 feet
Step-by-step explanation:
<em>The question is to find the lengths of 2 sides of the rectangle</em>.
<u>Solution:</u>
Let shorter side be "x"
Let longer side be "y"
From the question, we can write:
y = 3x
also
y - x = 10
Now, putting the first on second equation, we get:
y - x = 10
3x - x = 10
2x = 10
x = 10/2 = 5
Now, y = 3x, y = 3(5) = 15
So we can say the lengths of 2 sides of the rectangle is 5 feet & 15 feet
Value of the expression will be 7
<u><em>Explanation</em></u>
Given value of the variables are : 
and 
Given expression: 
So, <u>plugging the values</u> of 
and 
into the above expression, we will get...
So, the value of the expression will be 7.
You mean '39 is what percent of 12.5 ?'
So, the answer is
39/12.5 × 100
= 3.12 × 100
= 312%
So, 39 is 312% of 12.5.
(The percentage is greater because 39 is greater than 12.5)
