x² - 15 - 2x = 0 Arrange the left side in descending order of eponents of x: We need to factor the left side: Give the x² the coefficient of 1 1x² - 2x -15 = 0 Multiply the red 1 by the blue 15, getting 15. Now think of a pair of positive integers whose product is …

SOLUTION: If 2^x = 15 and 15^y = 32, find xy Algebra -> Exponential-and-logarithmic-functions -> SOLUTION: If 2^x = 15 and 15^y = 32, find xy Log On Algebra: Exponent and logarithm as functions of power Section

Question 675295: what is the next number in the sequence {1,2,6,15,31,... Answer by sachi(548) ( Show Source ): You can put this solution on YOUR website!

y = -(3/2)x + (15/2) --- given equation in slope intercept form. By comparing this equation with the slope intercept form, you can see that "m" (the multiplier of the "x") is -3/2 and "b" the y-axis intercept is +15/2. That's the answer to the problem. As an aid to seeing that this is correct, here's a graph of the original equation in the ...

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).

1x-2x=15 (1-2)x=15-1x=15 Divide by the coefficient of x, -1 on both sides of the equal sign.-1x/-1=15/-1 x=-15: To check to see if we're right, substitute -15 in where the x's were in the original equation and see if both sides equal. (-15)-2(-15)=15-15+30=15 15=15 The answer checks out. Happy Calculating!!!

Since the point is on the x-axis, the y-value is zero, so we can write is as (x,0) The squares of the distances from this point to the other points are (x-1)^2 + 2^2 (x+5)^2 + 15^2 Set them equal and solve for x: (x-1)^2 + 2^2 = (x+5)^2 + 15^2 x^2 - 2x + 5 = x^2 + 10x + 25 + 225 12x = -245 x = …

You can put this solution on YOUR website! x^2+5x+6 (X+3)(X+2) x^2-14x+45 (X-9)(X-5) x^2-21x-72 (X-24)(X+3) 6x^2-33x+15

2. the sides of a triangle are 8, 15 and 17 units. if each side is doubled, by how many square units will the area of the triangle increase? 1 Let the hyp = c and the other 2 sides a and b x^2= a^2 + b^2 x^2+20^2 = (x+10)^2 x^2 +400 = x^2 +20x+100 20x=300 X=15 ans Answer by stellababy(3) (Show Source):

Since x and y are both positive integer, so x has to lie between 1 and 33 -----(condition 1) Now y is a integer, hence (100-3x) must be a multiple of 5 For(100-3x) to be a multiple of 5, 3x also has to be multiple of 5 which is possible only when x is a multiple of 5 -----(condition 2) So, possible values of x meeting conditions 1 and 2 are:-