Suspecting that his parents are going to give him $1,300 continually you would solve like this
$120,000-$100= $19,900
$19,900/$1,300= 92.23
92.23 is the amount of $1,300 donations it would take from his parents, so if he was getting $1,300 month it would take 92.23 months
Harry can rake the leaves in the yard 8 hours faster than his little brother Jimmy can.
<span>If they join to work together they can complete the job in 3 hours. </span>
<span>1/x + 1/(x - 8) = 1/3 </span>
<span>3(x - 8) + 3x = x(x - 8) </span>
<span>x^2 - 14x + 24 = 0 </span>
<span>(x - 12)(x - 2) = 0 </span>
<span>Solutions: </span>
<span>x = 2 </span>
<span>x = 12 </span>
<span>Jimmy can complete the job on his own in 12 hours.</span>
False because doing the math doesn’t match
Answer:
x = 57/28
y = -95/84
z = 97/168
Step-by-step explanation:
Use the application in the next link: https://www.zweigmedia.com/RealWorld/tutorialsf1/scriptpivotold.html
Start with the expanded array:
then using the tool provided, make row operations until you find the solution:
r2 = r2-3r1
r3 = r3+2r1
r2 = r2*(-1/13)
r1 = r1- r2*5
r3 = r3+ r2*-3
r3 = r3*13/168
r2 = r2- r3*22/13
r2 = r2+ r3*6/13
Here you have a reduced array an therefore the answers to each variable are on each row:
You can factor -80 as
So, we have
The square root of a product is the product of the square roots:
Since and , we have