Answer:
Q3. Last option Q4. 3rd option
Step-by-step explanation:
s^2 = 9.8^2+5.1^2-2(9.8)(5.1)cos39
s^2=44.366489...
s=6.7
4. Substituting for y:
.. 7x -(6 -2x) = 3
.. 9x = 9 . . . . . . . . . add 6, collect terms
.. x = 1
.. y = 6 -2*1 = 4
(x, y) = (1, 4)
5. Substituting for x:
.. 3(y -4) +y = 12
.. 4y = 24 . . . . . . . add 12, collect terms
.. y = 6
.. x = 6 -4 = 2
(x, y) = (2, 4)
6. Substituting for x:
.. 4(y -5) -y = 4
.. 3y = 24 . . . . . . . add 20, collect terms
.. y = 8
.. x = 8 -5 = 3
(x, y) = (3, 8)
7. y = 2x -6 . . . . . add 2x to the first equation
Substituting for y:
.. 5x -(2x -6) = 9
.. 3x = 3 . . . . . . . add -6, collect terms
.. x = 1
.. y = 2*1 -6 = -4
(x, y) = (1, -4)
8. x = 2 -3y . . . . . add -3y to the first equation
Substituting for x:
.. y -(2 -3y) = -6
.. 4y = -4 . . . . . . . add 2, collect terms
.. y = -1
.. x = 2 -3*(-1) = 5
(x, y) = (5, -1)
x-intercepts of parabola: y = 0
We have y = 2x² - 8x + 8
Answer: x-intercepts: x = 1 and x = 3.
Answer:
24 units
Step-by-step explanation:
Note that BC is one side of the square. (Vertices are in order ABCD)
So, as a square has four equal sides, the perimeter is 4 times the length of BC.
We're given B is at (-2, 5) and C is at (4, 5). So, BC = 6 units.
So, the perimeter of ABCD is 6 * 4 = 24 units.
Answer:
one-tenth
Step-by-step explanation:
one-half minus two- fifths