Weegy: Does not understand the math equation you have presented us with. Please check again and resend.
User: Which of the following equations is of a parabola with a vertex at (1, 2)?
y = (x - 1)2- 2
y = (x - 1)2+ 2
y = (x + 1)2- 2
y = (x + 1)2+ 2
Weegy: Does not understand the math equation you have presented us with. Please check again and resend.
User: The line of symmetry for the quadratic equation y = ax 2 - 8x - 3 is x = 2. What is the value of "a"?
-2
-1
2
Weegy: c.2. y' = 2ax - 8 = 0, a = 2.
User: Runners in a long distance race start out going 8 kilometers east and then head north for the remainder of the race. The finish line is 10 kilometers from the starting line. How far did the runners travel north?
2 km
6 km
10 km
Weegy: well this question uses triangles. [ If you make a dot and then draw a line to the right (the east) then you have the bottom of the triangle which is the 8km, Then the runners went up until the met the finish line (so thats the other side of the triangle). Starting line to finish line is 10km so they gave you the hypotenuse. Now here is a trick that you can use, this is right angle triangle... There are several "rules" for triangles that you should memorize especially if you are taking the SAT/ACT sometime soon. This question gives you a 3,4,5 triangle. Which means that each side is a multiple of 3,4,5- > if the triangles sides are 6,8,10 and you divide all of those sides by 2 you get your 3,4,5. There are a few like this, and it makes for really quick math if you are in a time crunch. Hope that helped! ]
User: Runners in a long distance race start out going 8 kilometers east and then head north for the remainder of the race. The finish line is 10 kilometers from the starting line. How far did the runners travel north?
2 km
6 km
10 km
Weegy: well this question uses triangles. [ If you make a dot and then draw a line to the right (the east) then you have the bottom of the triangle which is the 8km, Then ...
(More) 8
The equation of a parabola with a vertex at (1, 2) is y = (x - 1)^2+ 2
Added 7/2/2014 9:26:05 AM
This answer has been confirmed as correct and helpful.
8
(-2, -1) is in the solution set of y < x^2 - x - 6
Added 7/2/2014 9:27:42 AM
This answer has been confirmed as correct and helpful.
8
1 = 2x^2 + 7x
2x^2 + 7x - 1 = 0
a = 2, b = 7, c = -1
b^2 - 4ac = 7^2 - 4(2)(-1) = 49 + 8 = 57
Added 7/2/2014 9:29:08 AM
This answer has been confirmed as correct and helpful.
8
2x^2 + x = 15
2x^2 + x - 15 = 0
(x + 3)(2x - 5) = 0
x = -3 or x = 5/2
The solution set for the equation 2x^2 + x = 15 is {-3, 5/2)
Added 7/2/2014 9:30:33 AM
This answer has been confirmed as correct and helpful.
