Answer: The expression is not factorable with rational numbers.
Step-by-step explanation:
First give 0 value to x and find y, then give 0 value to y and find x. the values you find will be the point that is on the line. then for example give 7 to x and find y. this will be the second point and draw the line. you just have to do the first step and try the second one
Step-by-step explanation:
y²=81
y²=9²
:. bases same powers equal,
y=9.
hope this helps you.
Answer: the average speed of the runners increased since last year.
Step-by-step explanation:
The table is:
Mean MAD
Last Year 16.2 s 1.2
This Year 14.7 s 1.9
Looking at this table we can see that this year, the mean time is smaller than the one from last year, so the runners are faster in average.
The mean absolute deviation is bigger, but the change in the mean is bigger.
difference of the mean 16.2 - 14.7 = 1.5
difference of the MAD 1.9 - 1.2 = 0.7
This means that the average speed of the runners increased since last year, and the fact that the MAD increased means that not all the runners increased their speed at the same rate, so now the speeds of the different runners are not as alike like last year.
