Answer:
z=-7
Step-by-step explanation:
x+y=22(double the average as there are two parts
x+y+z=22 (as shown in the last part)+z=15 (average tripled as there are three parts
22+z=15
z=15-22
z=-7
Answer:
15,894.06
Step-by-step explanation:
HI there!
This is a compound interest question, so we will use the formula
P being our principle amount, $15,000 in this case,
R being our rate, or 1.25
N being our compound rate, which is semiannually, or twice a year.
T is our time, being 3.
After plugging these values in, we get
15,894.06
I hope this helps!
Answer:
21x² - 7x - 28
Explanation:
To answer this question, we will simply multiply each term from the first bracket by each term from the second bracket and then combine like terms to get the final expression.
This can be done as follows:
(3x - 4)(7x + 7)
3x(7x) + 3x(7) - 4(7x) - 4(7)
21x² + 21x - 28x - 28
21x² - 7x - 28
Hope this helps :)
Y = 18 is just a straight horizontal line at (0,18)
Here, I'll help you a little
rewrite the equation as -6k/5 = 12
multiply both sides by 5
-6k=60
divide both sides by -6 to isolate k
k = -10
Hope this helps :)
