Answer:
z=12
Step-by-step explanation:
z+15=27
move constant
z=27-15
z=12
Answer:
d. 90 cm, 1.2 cm
Step-by-step explanation:
Given that:
The sample size n = 36
For the length of the link:
The mean
= 2.5
The standard deviation s = 0.2 cm
In a chosen 36 links, The mean and standard deviation for the length chain is as follows:
Mean = n
Mean = 36×2.5
Mean = 90 cm
The Standard deviation = s×√n
The Standard deviation = 0.2×√36
The Standard deviation = 0.2×6
The Standard deviation = 1.2 cm
The graph is touching the x-axis at x = - 5 and is turning away. This means the multiplicity of the root is 2.
So the roots f the polynomial are x= - 5 and x =- 5. The factors of the polynomial are x - 5 and x - 5. The polynomial can be expressed as the product of its factors. So the given polynomial is (x + 5)(x + 5).
Thus, the correct answer is option D
I believe these would be your steps:
21x = 63y
divide by a common factor of 7
3x = 9y
divide by a common factor of three
x = 3y is your simplest ratio
Hope this helps!