Step-by-step explanation:
total ratio is 5
first find the total amount
bob's ratio is 2/5
so 2/5 ×total amount=8 pounds
0.4 ×total amount=8 pounds
total amount=8/0.4=20 pounds
so chris receives: 20-8=12 pounds
Your answer is B. 620. I got this answer because the rule is that if the last two digits are divisible by 4, then the whole number is, and the last two digits of 620 are 20, and 20 ÷ 4 = 5.
I hope this helps!
Answer:
1 and -1
Step-by-step explanation:
Factoringfind a number set that equals zero and when multiplyed, becomes -1.
1 and -1 multiply to -1 and equal 0,
so x^2-1 turns into (x+1)(x-1)
solve for both x+1=0 and x-1=0
x+1=0
x=-1
x-1=0
x=1
Answer::0
Step-by-step explanation:
