3147.6 x 25 = 78690 and there’s one decimal place left so add the decimal place and it’s 7869.0 and the 0 doesn’t count so it’s 7869.
I think that this an example of a paired t test. Since each student (subject) is given 2 treatments of the same material.
Answer:
This system of equations has no solution.
Step-by-step explanation:
Solving a system of equations can be done using a few different methods. Since your second equation is already solved for 'y', you can substitute this expression (-x + 3) for the value of 'y' in the first equation:
2x + 4(-x + 3) = 10
Distribute: 2x - 2x + 12 = 10
Combine like terms: 0 + 12 = 10 or 12 ≠ 10
Since the variables cancel out and 12 ≠ 10, there are no solutions to this system.
The answer would be 6 and 8/9
18: 2 · 2 · 3 GCF: 3
45mn: 3 · 3 · 5 · m · n
12x: 2 · 2 · 3 · x GCF: x
49x²: 7 · 7 · x · x
5ab: 5 · a · b GCF: b
6b²: 2 · 3 · b · b
14b: 2 · 7 · b GCF: 2b
56b²: 2 · 2 · 2 · 7 · b · b
21x²y: 3 · 7 · x ·x · y GCF: 3xy
63xy²: 3 · 3 · 7 · x · y · y