Answer:
x= - 2
Step-by-step explanation:
hello :
note : the equation of the axis symmetry for the parabola : y =ax²+bx+c
when : a≠ 0 is : x=- b/2a
in this exercice : a=1 and b=10
so : x= -10/2 = -5
Answer:
b) use a two-sided test instead of a one sided test.
Step-by-step explanation:
If we are using a significance level of 0.05, then the two-tailed test assigns half alpha to test for statistical significance in one direction and half alpha to test statistical significance in the other direction. This implies that .025 is present in each tail of the test statistical distribution. When using the two-tailed test, regardless of the direction of the relationship you assume, we test the possibility of the relationship in both directions.
Answer:
Gabriela Mistral works as a humanitarian for
days.
Step-by-step explanation:
Gabriela Mistral was a poet, diplomat, teacher and humanitarian such that each week she worked a certain amount of days as a poet diplomat teacher and humanitarian.
Ratio is ![1:1:3:2](https://tex.z-dn.net/?f=1%3A1%3A3%3A2)
Let
denotes total number of days Gabriela Mistral work.
As she works 12 days as a teacher,
![\frac{3}{7}x=12\\ x=\frac{7}{3}(12)\\ x=28](https://tex.z-dn.net/?f=%5Cfrac%7B3%7D%7B7%7Dx%3D12%5C%5C%20x%3D%5Cfrac%7B7%7D%7B3%7D%2812%29%5C%5C%20x%3D28)
Total number of days ![=x=28](https://tex.z-dn.net/?f=%3Dx%3D28)
So,
she works as a humanitarian for
days.