3x^2 - 18x + 15
3x^2 - 18x = -15...divide by 3
x^2 - 6x = - 5...take half of -6, and square it...and add to both sides
x^2 - 6x + 9 = -5 + 9
x^2 - 6x + 9 = 4
(x - 3)^2 = 4
x - 3 = (+-) sqrt 4
x - 3 = (+-) 2
x = 3 (+-) 2
x = 3 + 2 = 5
x = 3 - 2 = 1
so x = 5 and x = 1
Answer:
The value of x = 11
Step-by-step explanation:
Given
- ≅
Determining the value of x
As B is between A and C, so
≅
as
so
x + 5 = 2(x-3)
x+5 = 2x-6
2x-x = 5+6
x = 11
Therefore, the value of x = 11
Answer: 53.92km
Explanation: First, do 8/5 to find out how many kilometers is equal to 1 mile. (The answer is 1.6.) Next, do 33.7(1.6) and you will get 53.92. Hope this helped
(4.2*10^-1)*(5.7*10^-1) = (4.2*5.7)*(10^-1 * 10^1)
23.94*10^-2 = .2394
moving the decimal one place to the left is the same thing as dividing by 10 or multiplying by
1/10. 2.394*10^-1, that is the answer you're looking for, B