More questions

[Celsion]

How do you work these out?
Invitational A-2006

12. The domain of the cruve defined by the parametric equations x(t)= 1+t and y(t)=t for t[-3,2] is:
(d) [-2,3]

15. The odds of scoring above 200 on this test is [unparseable or potentially dangerous latex formula]. If 204 students scored 200 or less then how many students took this test?
(d) 289

Invitational A- 2007

9. Suppose D, E, and F are points on circle O such that MD is tangent to circle O and ME is a secant to circle O through point F. If MD=4, EF=x and MF=2, then ME equals:
(b) 8

59. Let s(x) be the slant (oblique) asymptote of f(x)=[unparseable or potentially dangerous latex formula]. Find s(2).
(c) 4

TMSCA State- 2007

8. Which of the following are the side lengths of a scalene obtuse triangle?
(e) 8, 7, 14

52. A math password has 4 digits. The first digit is a prime number, the second digit is an even number, the third digit is a multiple of 3 greater than zero, and the last digit is a factor of 12. How many math passwords can be made without duplicating passwords?
(b) 300
On this questions, wouldn't it be 4 (2,3,5,7) * 4 (2,4,6,8) * 3 (3,6,9) * 5 (1,2,3,4,6)= 240, the only way I could see this being 30 is if 1 is counted as prime, which I thought wasn't.

If you can solve all of these THANKS SO MUCH, these problems have been bothering me. Thanks in advance.

[xanavi1130]

u forgot that 0 is an even number on the last one.

[stupidityismygam]

[Kurt]

[Sternhund]

[AuSmith]

[Kurt]

Oops! Yeah sorry I knew that, lol. I guess I didn't check which way my signs were pointing well enough.

I'll go edit it.

(And I usually think about it the same way Aaron.)