The sum of the digits of a two-digit number is 7. When the digits are reversed, the number is increased by 27. Find the number :D please-Ok, so lets work this out:
what 2 digits equal 7?
- 5+2
- 3+4
Two consecutive integers: n and n+1
Reciprocals of two consecutive integers: 1/n and 1/(n+1)-Two consecutive integers
x, & x + 1
Reciprocals
1/x, & 1/(x + 1)-1/n and 1/(n+1)-1/x and 1/(x+1)
How do I re-arrange the following to get the answer?
y = a(x-p)(x-q), where x = (p+q)/2
THE ANSWER:
y = ((ap-aq)(q-p))/2
I will give best answer. :)-y = a ( x - p ) ( x - q ), where x = ( p + q ) /
How many liters of a 60% acid solution must be added to 14 liters of a 10% acid solution to produce a 25% acid solution?
Please explain the steps so I can learn, thank you!-Let x = amt of 60% acid an
ax^3 + 3bx^2 + 3cx + d = 0 are in G.P-Let roots be k/p, k and kp which are in GP
Sum of roots =k/p+k+kp =-3b/a (A)
Sum of products in pairs=k^2/p+k^2p+k^2 = 3c/a (B)
Product =k^3=-d/a (C)
Now eliminat
20. Graham walked to school at an average speed of 3 miles an hour and jogged back the same route at 5 miles an hour. If his total traveling time was 1 hour, what was the total number of miles in the
I have answered them, but I would like to know if I got them right. Im not that great at math, but this is really hard. Please no rude or unhelpful comments. I did do my work, I just need confirmation
Q: http://imageshack.us/photo/my-images/713…
the point given isnt on the curve, so i only got to what the slope is from taking the derivative, but what do i do after that?
any tips or hints or answ
1) (tanx - 1)/2(tanx + 1)w.r.t.x
and
2) (-1)/(tanx + 1)w.r.t.x
both has derivative 1/(cosx + sinx)^2-That is correct, because these two functions DIFFER BY A CONSTANT...
This is true for ANY pair
could someone please tell me if i rewrote it correctly?
¬ ( ƎxƎy ¬P(x,y) ʌ ∀x∀y Q(x,y) )
to
∀xƎy P(x,y) v Ǝx∀y ¬Q(x,y)
is ¬∀x∀y the same as Ǝx∀y or ƎxƎy?-If I understand this language correctly t
Please show all working :)-a = 2
d = 7
1512 = [4+7(n-1)]*n/2
3024 = n(7n-3)
7n^2-3n-3024 = 0
complete the square
n^2-3n/7=432
(n-3/14)^2=432+9/196
n = 3/14±sqrt(432+9/196)
n=21-Both you and Mike are g
Im doing something wrong with my algrbra could someone show the steps to solve for A and B? (In terms of β,b,k, and m)
A(k −β² m) + Bβ b = 0
B(k − β²m) − Aβ b = 1-Mind you, I cant be positive this is
