Answer:
2x = -5 +/- root 5 (opt 3)
Step-by-step explanation:
0 = 4f(x)
= 4(x^2 + 5x + 5)
= 4x^2 + 20x + 20
= (2x)^2 + 2*2x+5 + 25 - 5
= (2x + 5)^2 - (root 5)^2
= ((2x+5) - 5) ((2x + 5) + 5)
= (2x + 5 - 5) (2x + 5 - 5)
Therefore, 2x = -5 +/- root 5
Hope u understand.
Please mark as the brainliest
Thank You
Answer:
You have to understand, this question is to long
Step-by-step explanation:
U are supposed to have a simple question not a whole parragragh. Just saying
3/4 box = 12 oz
we first need to find 1/4 of a box. to do that divide both sides by 3
1/4 box = 4 oz
for a full box which is 4/4 multiply both sides by 4
1/4 x (4) = 4 x (4) oz
4/4 ( or one whole) = 16 oz
Answer:
Check the answers to the questions below
Step-by-step explanation:
a) If is the average learning rate of the 6th graders without background noise level and is the average learning rate of the 6th graders with background noise level
The Null Hypothesis is that the learning rate of the 6th graders is not affected by the background noise level.
Null hypothesis,
b) The Alternative Hypothesis is that the learning rate of the 6th graders is affected by the background noise level.
Alternative hypothesis,
<u>c) Assumptions that must be met about the data before she can correctly use independent t-test</u>
There must be random selection of the 6th graders
That the two groups are normally similar in their learning abilities
The division of students into the two groups should be at random
d) She has to make these assumptions to prevent bias and inaccuracy of results. If these assumptions are not made, the outcome of the experiment may not reflect the true effect of background noise on the learning of the 6th graders.
She can still get accurate results if she include some bias in the selection to prove a particular result.