If sin(x)=-5/13 and x is in quadrant III,... So for angle x, we have a 5-12-13 right triangle in quadrant III, where x =-12, y=-5, and r=+13. There is often a conflict of notation when x is used for an angle, and also for values of the adjacent side of the defining right triangle. There is a problem here. But I think you won't get confused.

what you do is multiply the first numerator, x, by the 2nd denomenator, 13, and you get 13x, then you multiply the 1st denomenator, 5, by the 2nd numerator, 10, and you get 50, afterwords divide 50 by 13x (when you do this your basically putting the x on one side of the equation and the answer on the other side) and you get x=3.846153846 etc ...

x(x+1) is WRONG! It means a function x of x-1. x*(x-1) is right. Use the ^ (caret) for exponentiation. x^2 means x squared. x/2y means Resources: Simplifier Portal, help with entering simplifier formulas (a must read).

Question 738145: Kristin spent $131 on shirts. Fancy shirts cost $28 and plain shirts cost $15. If she bought a total of 7 then how many of each kind did she buy?

You can put this solution on YOUR website! The prime factorization of "k!" is .The value for "k" is

There may be some trick that gives an easier way than to solve for all the letters, but here it is that way: Solve the first two equations for a, by Cramer's rule: Solve the 2nd and 3rd equations for a, by Cramer's rule: Set the first and second values for a equal: Multiply both sides by equation 1: ----- Solve the 3rd and 4th equations for a ...

the relationship between x and y is a function because each and every value of x results in one and only one distinct value of y. in function notation, y = .13 * x is written as f(x) = .13 * x f(5) replaces x with 5 to get f(5) = .13 * 5 = .65 it tells you to evaluate the function when x = 5. x = 5 means you printed 5 digital pictures.

So, this problem is about a triangle. You may even make one step forward and to see (or to guess/to recognize) a right-angled triangle here. As soon as you identify a right angled triangle, apply the Pythagorean formula d = = = = 13 meters. ANSWER (5,12,13) is a Pythagorean triple, next after (3,4,5). Solved.

that dx/dt = +5 at the moment x = 12. The length of the ladder, 13 feet, is a constant, since its length doesn't change. ````` (a) How fast is the top of the ladder sliding down the wall then? x^2+y^2 = 13^2 Solve for dy/dt in terms of x,y, and dx/dt: use your calculator and you get y = …

the ratio of the two acute angles in a right triangle is 5:13. what is the measure of each angle in the right triangle? *** let x=measure of one acute angle 90-x=measure of other acute angle x/(90-x)=5/13 13x=450-5x 18x=450 x=25 90-25=65 measure of one acute angle=25˚ measure of other acute angle=65˚