If he had $422 to begin with and bought $524 worth of stuff with money he didn't have them his account would go into the negative, $-102
A•B=C
A•B=-21
Find factors of 21 ( it doesn't matter that it's negative ) that at up to be 4
It's 7and 3
Then put x^2+7x+3x-21 and then factor by grouping
Do the same steps for #2
2/5 (-7) 5/2 as you know 2/5 x 5/2 = 1
so 1 x (-7) = -7
so the asnwer is -7
Answer:
13/18
Step-by-step explanation:
26/2= 13
36/2= 18
13/18