Answer:
$13,000 at 7% and $12,000 at 4%
Step-by-step explanation:
Use formula:
where
I = interest,
P = principal,
r = rate (as decimal),
t = time (in years)
<u>7% rate:</u>
P = $x
r = 0.07
t = 1 year
Then
<u>4% rate:</u>
P = $(25,000 - x)
r = 0.04
t = 1 year
Then
If he receives an annual return of $1,390, then
so
Answer:
C) (a-12b)(a+12b)
Step-by-step explanation:
a^2-144b^2 = (a-12b)(a+12b)
This is the formula that when two terms squared are written with a minus sign between them their factors are the product of the original numbers once with a plus sign and once with the minus sign.
This can be explained by multiplying them.
(a-12b)
<u> *(a+12b) </u>
a²- 12ab
<u> +12ab - 144b² </u>
<u> a² +0 - 144b² </u>
We see we get the same answer as applying the formula above.
38 km= (3x-1)+x+((3x-1)-2)
38 = 3x-1+x+3x-1-2
38 = 7x-4
7x=42
x=6 km --> second day
Test: 38 = (3*6-1)+6(3*6-1)-2)
--> frist day: 3*6-1 = 17 km
Answer:
Step-by-step explanation:
Since this is a test/homework, I'll give you a hint.
For a linear graph, if you took a ruler, and traced the "dots", it should always be in a straight line.
Another way, is finding a pattern. I can't really explain this so much, since it's fairly basic. Just find two dots, and see if they are similar in any way. If they are, good job! Find another. If their isn't, maybe try searching for another.
The third way: You could use the equation mx+b=y, but this is just a bit ridiculous for this problem, since you could just eye it.
Hope this helps!