The solution is 
and 
Step-by-step explanation:
The expression is 
and 
Using substitution method we can solve the expression.
Let us substitute 
in
Expanding and simplifying the expression, we get,
Let us use the quadratic equation formula to solve this equation,
Thus, 
and 
Substituting y-values in the equation , we get the value of x.
For ⇒ 
For ⇒ 
Thus, the solution set is and
Just write down the negative values of each withdrawal and add up those values for the first two.
1. -25 + -45 + -75 = -145
2.-35 + -55 + -65 = -155
As for the third question, the brother took out $10 more than Julie, so he withdrew $165. A possible equation with possible values could be:
3. -15 + -65 + -85 = -165
Keep in mind that there are multiple ways to answer the third question and that's only one of them. Hope this helped!
I believe the answer is the carp travels 9 1/<span>4</span> miles in 2 <span>1/2</span><span> hours</span>
Let's first break it down to the time 8 people need for one wall. That would be 10 minutes, right? If one person would have to do it in stead of 8, you'd expect him to take 80 minutes.
To paint 7 walls, he would nee 7x80 = 560 minutes. 10 people would do that 10 times faster, ie., 56 minutes.
I know puzzles like these always have a mindtrick. Did I miss anything?? ;-)
