Answer:
It decreases by 5 each time. -5 would be another way to state it
Step-by-step explanation:
9514 1404 393
Answer:
= x + y + 20
Step-by-step explanation:
There are a couple of ways you could write this.
friend sales + your sales
= (14 +x) +(y +6)
= (x +14) +(6 +y) . . . . commutative property used twice
= x +14 +6 +y = x +20 +y
= x + y + 20 . . . . . . . commutative property used again
__
first-day sales + second-day sales
= (14 +y) + (x +6)
= (y +14) +(6 +x) . . . . commutative property used twice
= y +14 +6 +x = y +20 +x
= y +x +20 . . . . . . . . commutative property used again
= x + y + 20 . . . . . . . and again
_____
<em>Additional comment</em>
We also used the associative property (to move parentheses) and the properties of addition of integers to simplify the sum. We have chosen to put the variables in lexicographical order, a sort of standard.
The painting is 38 inches longer than the photo frame.
Consider the numbers as, if we assume our first number to be x and second number being y, then from the given information we will be having the following equations :
Now, rewrite the second equation as ;
Divide both sides by 3 ;
Now, consider the second equation of the above cases
Now, multiply (i) by 2 on both sides :
Now, subtracting (ii) from (iii) will give us :
Now, putting x = 4 in (i), will give y + 4 = -4, then solving for y will yield
Hence, we can conclude that :