Step-by-step explanation:
Your answer is 4. Hope you like my answer.
Answer:
5 dollars per hamburger
Step-by-step explanation:
10 divided by 2
Answer:
Step-by-step explanation:
The vertices lie on the x-axis, as is determined by their coordinates. This makes the center of this hyperbola (0, 0) because the center is directly between the vertices. The fact that the foci also lie on the x-axis tells us that this is the main axis. What this also tells us is which way the hyperbola "opens". This one opens to the left and the right as opposed to up and down. The standard form for this hyperbola is:
and so far we have that h = 0 and k = 0.
By definition, a is the distance between the center and the vertices. So a = 5, and a-squared is 25. So we're getting there. Now here's the tricky part.
The expressions for the foci are (h-c, k) and (h+c, k). Since we know the foci lie at +/-13, we can use that to solve for c:
If h+c = 13 and h = 0, then
0 + c = 13 and c = 13.
We need that c value to help us find b:
and
and
and
so
b = 12. Now we're ready to fill in the equation:
and there you go!
Answer:
80
Step-by-step explanation:
89^2-39^2=6400, 6400=80^2
Answer:
number = 267
Step-by-step explanation:
i am a 3 digit number divisible by 3.
100a + 10b + c
my tens digit is 3 times as great as my hundreds digit
b = 3a, from this we know a = 1, 2, 3, then b = 3, 6, 9
and the sum of my digits is 15.
a + b + c = 15
if you reverse my digits i am divisible by 6 and 3
100c + 10b + a
this is a logic problem, an equation won't help us here
From the given information b = 3a, and the sum of the 3 digits = 15, we have:
1 3 ___; three single digits can't add up to 15
2 6 _7_; this has to be the number
3 9 _3_; reverse number is not different
Check for division by 3 and 6
267/3 = 89
762/6 = 127
267 is the number