Answer:
Step-by-step explanation:
7) 2ab + 4ac = 2*a*b + 2 *2 *a*c
= 2a(b + 2c)
8) ac - a²c² = c( a - a²c)
bc - abc = c(b - ab)
9) b²+ 4b - 5 = b² + 5b - 1b - 5
= b(b + 5) - 1(b + 5)
= (b +5)(b - 1)
b² + 8b + 15 = b² + 5b + 3b + 15
= b(b + 5) + 3(b + 5)
= (b + 5 )(b + 3)
2x-42=64
{(1,0)(,1,1),(1,2),(2,0),(2,1),(2,2),(3,0),(3,1),(3,2)}
Solution
A= {1,2,3}
B={0,1,2}
A×B ={(1,0),(1,1),(1,2),(2,0),(2,1),(2,2),(3,0),(3,1),(3,2)}
You list the step by step and you're done.
Do you have an example??
104 mins, 468 mins
Let the time spent on puppy videos = 2x
Where x is the number of weekends.
Time spent on regular TV = 9x.
So total time spent is 572 mins
i.e 2x + 9x = 572
i.e 11x = 572
So x = 52.
So time spent on puppy videos = 2 X 52
= 104 mins
So time spent on puppy videos = 9 X 52
= 468 mins.