Answer:
Petra
Step-by-step explanation:
Petra's acc has $32.50,while John's balance acc has $34.60 so,petra has less balance money
Let t and s represent the masses of 20% and 60% alloys respectively.
t+s=80, s=80-t
(0.2t+0.6s)/80=0.52 multiply both sides by 80
0.2t+0.6s=41.6, now using s=80-t in this equation gives us:
0.2t+0.6(80-t)=41.6 perform indicated multiplication on left side
0.2t+48-0.6t=41.6 combine like terms on left side
-0.4t+48=41.6 subtract 48 from both sides
-0.4t=-6.4 divide both sides by -0.4
t=16, since s=80-t
s=64
So 16kg of 20% alloy is mixed with 64kg of 60% allow to make 80kg of a 52% alloy.
From the pool of 5 letters, we're picking 4. We can arrange the 4 we picked in
ways.
But there are 5 ways of *not* picking the remaining letter. To account for the arrangements containing the letter not picked, we multiply this total by 5.
Put another way, suppose we drew a, b, c, and d, but not e. We have 24 possible arrangements for these 4 letters, but for any distinct arrangement there are 5 ways of replacing any letter with e.
So the number of arrangements we can actually make is
.
Answer:
18 for the first one Rooney and bectam
Answer:
1 was off the most
Step-by-step explanation:
if you subtract the two extremes from 7, you'll find that:
7 - 12 = -5, which means that 12 was only 5 away from the correct answer, while
7- 1 = 6, which means that 1 was 6 off from the correct answer, which means that that answer was off by the most