Answer:
x = 7
x = -5
Step-by-step explanation:
Given
x² - 2x - 35 = 0
Consider the factors of the constant term (- 35) which sum to give the coefficient of the x- term (- 2)
The factors are - 7 and + 5, since
- 7 × 5 = - 35 and - 7 + 5 = - 2, thus
(x - 7)(x + 5) = 0
Equate each factor to zero and solve for x
x + 5 = 0 ⇒ x = - 5
x - 7 = 0 ⇒ x = 7
Answer: The mean is 6.
1.) (Add) To find mean, add all listed values then, divide by the total amount of values.
- 2 + 3 + 5 + 5 + 6 + 7 + 7 + 7 + 8 + 10 = 60.
2.) Divide the total by the amount of values.
- 60/10 ( There are 10 numbers in total ) = 6.
1) Choice A. We can divide both sides by 5 to solve for x.
2) Choice A, yes.
Let’s divide both sides of the equation by 5.
5x=20
5x/5 = 20/5
x = 4
The equations have the same solution, so they are equivalent
it should be 1/6 not 16
there are 6 numbers on a die so to get a number you have a 1/6 probability
so 1/6 x 1/6 = 1/36
the probability of getting both a 6 and a 3 is 1/36
0.9 of 20:
You could also think of 0.9 as 9/10.
9/10, if you multiply by 2/2, is 18/20.
So therefore, you would then know that it would be 18, because 20 was the whole number, so what over 20 is equal to 9/10? 18.
A simpler method is just to multiply. 0.9 * 20 = 18.