Answer:
x =2.2 y= 12
Step-by-step explanation:
Add the two equations 5x-5x is zero
_y +3y =24
-1+25=24
so the equation becomes 2y=24
y=12
5x-12=-1
5x=-1+12
5X=11
so x = 2.2 y =12
Step-by-step explanation:
the number 4 is false
p-q =-(q-p)
I don't understand what you mean by 'mentally' but anyways, here is how to solve it.
(z−12)(z+12)
=(z+−12)(z+12)
=(z)(z)+(z)(12)+(−12)(z)+(−12)(12)
=z^2+12z−12z−144
=z^2−144
Answer:
2x-3/3
Step-by-step explanation:
Hope this helps
Answer:
The sales for the store 7 days after the end of the advertising campaign is
$3849.74
Step-by-step explanation:
From the question we are told that
The daily sales on the end of campaign day is = $8,500
The daily sales three days after end of campaign day is = $ 5,100
The usual day sales of the store is = $ 3,500
Generally the Newton's Law of Cooling (Heating). equation is mathematically represented as
Here t is the number of day after the campaign ended
Now substituting values to obtain the constant k
For t = 3
=>
=>
=>
So at t = 7
substituting values
$3849.74