Answer:
B
Step-by-step explanation:
<span>{2y = x + 10
{3y = 3x + 15 |:3
</span>{2y = x + 10
{y = x + 5
{2(x+5) = x + 10
{y = x + 5
{2x+10 = x + 10
{y = x + 5
{2x - x = 10 - 10
{y = x + 5
{x = 0
{y = x + 5
{x = 0
{y = 5
Answer:
The answer is : b) a confound
Step-by-step explanation:
While manipulating, is possible that some factors like noise in the hall, can affect learning in one of the groups but not in the other.
This possibility reflects the presence of a confound.
We can define a confounding variable as an external influencing factor which results in bringing changes in the effects of a dependent and independent variable.
This variable changes the outcome of an experiment and produces useless results.
No.
a. take 35% off 30 =19.5
b. first take 25% off 30 = 22.5, then take 10% off 22.5 = 20.25