Math

posted by .

1.Write the equation 5x+y-2=0 in normal form.

5x+y-2=0
5x+y=2 (add two to both sides)
Standard form (Ax+By=C)---> 5x+y=2

Y-intercept (when x equals 0)
5x+y-2=0
5x+y=2
5(0) +y=2
y=2

X-intercept (when y equals 0)
5x+y-2=0
5x+y=2
5x+0=2
x=2/5

Slope intercept (y=mx+b)
5x+y-2=0
5x+y=2
y= -5x+2

2.Use the sum or difference identity to find the exact value of tan105 degrees.

tan 105 = tan (60 +45) = (tan 60 +tan 45)/ 1-tan60tan45 =
(sqrt 3 + 1) / (1 -sqrt3 (1)) =
(1 +sqrt 3)^2 / (1-sqrt 3)(1+sqrt 3) =
(1 +sqrt 3)^2 /( 1-3) =
(1 +2sqrt 3 + 3) / (-2) =
-2-sqrt3

  • Math -

    #1 ok
    #2 ok

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Algebra

    What is 2x=7? Is it a standard form, or slope-intercept form, or not a linear equation?
  2. MATH

    Please help me!!!!!!!!!!!!!!!1 Instructions a. If needed, rewrite the following equations in slope-intercept form. * b. Indicate the slope and the y-intercept for each of the equations. c. Using graph paper and a straight edge, graph …
  3. Math

    How do I put this equation in slope intercept form?
  4. algebra again

    Write an equation that passes through the points (4, 3) and (2, -2) I have -2 -3 is -5 and 2-4 is -2 so y equals -5/2x plus b. I put in 2,-2 into the equation to get the y intercept, so 2 equals -5/2 times 2 plus b -5/2(2) is -10/-4 …
  5. Algebra

    I have an assignment to write an equation to point-slope form, then to standard form, and then to slope-intercept form. I have used the points (-2,-1) or (1,2), but I used (-2,-1). Now, I have the point-slope form of y + 1= 1(x + 2) …
  6. Quick math help

    My math exam is coming up Friday and I need help!! Can you please guide me throgh the processes on the three questions?
  7. math - pls check!!!

    Write an equation in point-slope form for the line that passes through one of the following pairs of points (you may choose the pair you want to work with). Then, use the same set of points to write the equation in standard form and …
  8. Algebra 2

    Can someone help me with this equation please?
  9. Math

    Write the equation of the line in the indicated form that meets each criterion below. A. A line with a slope of -2/3 and a y-intercept of 4; in slope-intercept form B. A line with a y-intercept of – 2 and an x-intercept of 3; in …
  10. Math

    1. Find the slope of the line that passes through the points (-1, 2), (0, 5). 2. Suppose y varies directly with x, and y = 15 and x = 5. Write a direct variation equation that relates x and y. What is the value of y when x = 9?

More Similar Questions