Answer:
Step-by-step explanation:
1. Find two numbers that add to make the coefficient of x (in this case, -5) and that multiply to make the constant term multiplied by the coefficient of x^2 (in this case, -2 x 3 = -6)
Two numbers that work are -6 and +1
-6 x +1 = -6
-6 + -1 = -5
2. Split the middle term into the two numbers that you found.
3x^2 -6x +x -2 = 0
I've put the -6 on the left side because in our next step, when we factorise, it will be easier than having the numbers the other way around.
3. Factorise the left side by taking out common factors from each pair. The pairs I'm talking about here are '3x^2 and -6x', and 'x and -2'
3x (x-2) +1 (x-2) = 0
4. You now have two numbers both being multiplied by the term x-2. We can rearrange this equation to give us two brackets being multiplied by each other.
(3x + 1) (x-2) = 0
5. According to the Null Factor Law, if two terms are multiplied together and the result is 0, then one of those terms must be 0. Make both terms equal to 0 and solve each for x.
3x + 1 = 0 x-2 = 0
3x = -1 x = 2
x = -1/3
6. The solutions to this equation are x = 2 and x = -1/3
Answer:
Hi! Your answer would be 34.
Step-by-step explanation:
Okay, so 40% off of $85 would be $51. Subtracting $85 and $51 gives you $34.
Answer:
2
Step-by-step explanation:
That would be 0.2
Hope this helps. :)
I will assume that 0 =72 refers to that the angle of the sectoris 72°.
If so, this sector represents 72°/360° = 1/5 of the total circle.
Then the area of the total circles is 5 * 45yd^2 = 225 yd^2
The radius is obtained from:
Area = π(r^2) = 225 yd^2
r^2 = 225 yd^2 / π = 71.62 yd^2
r = √(71.62yd^2) = 8.5 yd
Answer: 8.5 yd
