Answer:
<h2><u />
-
</h2>
<u />
Step-by-step explanation:
Ok, let's pretend that R is 5 and S is 10
That means that Sophie spent 2 hours while Rana spent 4 which means to find the difference you have to subtract. Back to the real problem, we see that we are given R and S not numbers, but variables; as a result, we show the operation then subtract.
Hope this helped my dude.
Well this is easy.
We have linear inequality,
Simplifying this a bit to get,
Divide by 3 (both sides),
Or with interval notation, 
.
Hope this helps. :)
No, not at all.
The general quadratic equation is
Ax² + Bx + C = 0 .
The roots are real only if (B² - 4AC) is not negative.
That means if you graph it, it touches or crosses the x-axis.
If the graph is up in the air and never touches the x-axis,
then it has no real roots.
For the bottom you could switch the top row with the bottom and you would have to divide instead of multiplying
Her profit is $4.80 :)
$7.20•2=$14.40
24 pens • $0.80 =$19.20
$19.20-$14.40=$4.80 profit :)
