Rewrite y^4 as (y^2)^2
(y^2)^2 + 14y^2 +49
Rewrite 49 as 7^2
(y^2)^2 + 14y^2 +7^2
Factor using the perfect square rule.
Final answer: (y^2 + 7)^2
There are 50 parking spaces because 10×5=50
Answer: c
Step-by-step explanation:
Sure. From those choices, the only one that makes sense is that he
didn't perform enough trials. Technically, you can't expect the experimental
probability to match the theoretical probability until you've rolled it an infinite
number of times.
I have a hunch that even for only 60 trials, such a great discrepancy between
theory and experiment is beginning to suggest that the cubie is loaded. But
you really can't say. You just have to keep trying and watch how the numbers
add up.
His work should have looked like this.
2x + y = 5
x − 2y = 10
y = 5 − 2x
x − 2(5 − 2x) = 10
x − 10 + 4x = 10
5x − 10 = 10 When he added in both sides, he subtracted 10 from 10,
5x = 20 instead of adding 10 from 10 to make 20.
x = 4
2(4) + y = 5
8 + y = 5
y = -3
