Step-by-step explanation:
0.3(9x + 2) [Then we multiply to expand]
= 2.7x + 0.6 (Ans)
If the discriminant b^2-4ac is 0, then you have TWO EQUAL, REAL ROOTS.
If you're given the x-intercepts, you can determine the factors of the polynomial as follows: Take -3, change the sign and write (x+3). Take 5, change the sign and write (x-5). Then the eq'n of the parabola is
f(x) = (x+3)(x-5) = x^2 - 2x -15, in which a=1, b = -2 and c= -15.
You can find the x-coordinate of the vertex, which is also the equation of the axis of symmetry, using
x= -b / (2a). Here, x = -(-2) / (2[1]), or x = 1
Find the y-coordinate by subbing 1 for x in the equation above:
y = (1)^2 - 2(1) - 15 = 1 - 2 - 15 = -16
The vertex is at (1, -16) and the equation of the axis of symm. is x = 1.
2.33 years. The principal amount of 40,000 takes 2.33 years to reach 51,200 with a simple interest of 0.12. 2.33 years.
Answer:
the answer is C) 7 and -7
Step-by-step explanation:
Answer:
110°
Step-by-step explanation:
Angles on a quadrilateral always add up to 360°.
So, 100+95+55 = 250.
360-250 = 110°
