UIL C

[Celsion]

7. Allie Kat weighs 90 pounds and is sitting on a seesaw 120 inches from the middle. Don Key weighs 150 pounds. How far from the middle must Don sit in order to balance the seesaw?

25. P, Q, and R are positive integers. If P+(1/(Q+(1/R)))= 25/19, then find P+Q+R.

42. The vector (2, -6) is parallel to which of the following vectors?

(A) (8, -1.5) (B) (-7, 21) (C) (1, -3) (D) (-1, 12) (E) (-6, -18)

46. Sal Tee makes a solution that is 12% salt by combining 2 ounces of a solution that is 15% salt with 1 ounce of a solution containing an unknown amount of salt. What is the percentage of salt in the 1 ounce solution?

Also, can anyone upload the answer keys for number sense, calculator, math, and science? Or send them to me by e-mail or AIM?

[peterliang]

7. this is like a physics torque problem. Fr = Fr so (90)(12) = 150(x)

25. rewrite 25/19 is 1 + 6/19, so now P = 1, and 6/19 = (1/Q+(1/R)), so 19/6 = Q + 1/R, again repeat the same thing, so Q = 3, so now !/R = 1/6 and R = 6
so 1 +3+6=10

42. i didn't answer this one so im not sure but i wud think that its just C. its(x,y) vectors

46. im too lazy to type this out lol

[bradp]

42) C
2,-6 points SE
1,-3 points SE
and they are proportional

46)[unparseable or potentially dangerous latex formula]
solve for x