Which of the following points are solutions to the system of inequalities 2x – 3y > 9 and -x – 4y > 8? a. (1,-3) b. (-1,-3) c. (1,3) d. (-1,3) Thanks! 🙂 2 ✅ Answers ? Favorite Answer Check a. x=1, y=-3 . The first inequality gives 2- -9>9, 11>9 which is true The … Read more
89 ✅ Answers ? Favorite Answer http://en.wikipedia.org/wiki/Foot_(unit_of_length) There are 12,plus here is a link on it too for you.take care Don’t the teach you anything in school these days. There are 12 inches in a foot. 3 Grains=1 Inch 12 Inches=1 Foot 3 Feet=1 Yard 22 Yards=1 Chain 10 Chains= 1 Furlong 8 Furlongs=1 Mile … Read more
use everything you want 8 ✅ Answers ? Favorite Answer The proof is straightforward. Let’s use the greedy algorithm that bites from the fraction as much as it can. That means that for fraction a/b we select such n that 1/n < a/b < 1/(n-1) Left ineqaulity means na >b or na-b>0 Right inequality means … Read more
http://i11.photobucket.com/albums/g410/freebiegi… Which system of inequalities describes the above graph? a. x+2y>4 and y<2x b. x+2y<4 and y>2x c. x+2y<4 and y>2x d. x+2y>4 and y<2x 1 Answer ? Favorite Answer You must remember that a set of inequalities describes a region and not a graph. The unshaded region is below the dotted y = 2x … Read more
find the weight of each one 2 ✅ Answers 4n = weight of truck n = weight of car total weight = 6075 required: find the weight of each. 4n+n = 6075 5n = 6075 n = 6075/5 n = 1215 (truck) 4n = 4(1215) 4n = 4860 (car) n = 1215 =) weight of … Read more
All the angles are in degrees 6 ✅ Answers ? Favorite Answer Edited version. (Thanks to Brian) Anyway, I’ll show that instead of using 45 numbers in the product we can reduce it to only 15. The identity to this end is tan x tan(60+x) tan(60-x) = tan 3x. So tan 1 tan 59 tan … Read more
Find ratio of sides of rectangle that can be put in this position: http://s524.photobucket.com/albums/cc321/Krejakovi… Any line touched by any circle is tangent line! 5 ✅ Answers ? Favorite Answer The ratio BC/AB is the positive root of the equation z^4 – z^3 – z – 1 = 0. The above equation has only 2 real … Read more
You have two unit circles passing through centers of each other, then inside the common region again you have two circles with similar arrangement. This arrangement is iterated infinitely as shown in the following image http://i233.photobucket.com/albums/ee201/vcpandya/… Let x_n represent radius of the nth pair of circles, thus x_1 = 1 as first pair is of … Read more
given quadrilateral ABCD where AB = BC = CD angle ABC = 70° , angle BCD = 170° find angle BAD. Update: the answer is said to be an exact integer in degrees. Update 2: the answer is exactly 85° Now I’m having a harder time determining which response I’ll be giving the ‘best answer’ … Read more
X is an n-digit integer, XX is a 2n-digit integer. For example, if X=195 then XX=195195 (which is not a complete square). Update: Very nice too, Pandect. Just a couple of minutes behind Scythian the Great. Update 2: Very nice Scythian. I am impressed. 10 points will go for you if no one can discover … Read more