Answer:
my bad if I'm not right but, 2, -14,-30,-46 :) .
Step-by-step explanation:
Answer:
9.60 dollas
Step-by-step explanation:
24/0.75=32
32x0.30=9.6
Time taken by Ella is 0.6 hour
<u>Solution:</u>
Lily finished a task in 
hour
Ella finished it in 
of time Lily took
<em><u>To find: time taken by Ella to finish the task</u></em>
Let "L" be the time taken by Lily
Time taken by Lily = L = 
From given statement,
Time taken by Ella to finish the task is of time Lily took
Therefore,
Time taken by Ella = of time taken by Lily
Thus time taken by Ella is 0.6 hour
<span><span>let x = cows last year
</span>
</span><span><span>let y = bulls last year
</span>
</span><span><span>x + y = last years total
</span>
</span><span><span>0.9x + 1.5y = 660 (this year's total)
</span>
<span>1.1(x+y) = 660 </span>= </span><span>1.1x + 1.1y = 660
</span><span>
</span><span><span>so:
</span>
</span><span><span>0.9x + 1.5y = 1.1x + 1.1y
</span>
</span><span><span>subtract 0.9x from each side:
</span>
</span><span><span>1.5y = 0.2x + 1.1y
</span>
</span><span><span>subtract 1.1y from each side
</span>
</span><span><span>0.4y = 0.2x
</span>
</span><span><span>to make x 1 multiply both sides by 5
</span>
</span><span><span>2y = x
</span>
</span><span><span>substitute for x in one of the original problems:
</span>
since they had 660 this year and that number is 10%
higher than last year, then we had 600 total last year. </span>
<span><span>So:
</span>
</span><span><span>600 = x + y
</span>
</span><span><span>substitute into that one with the 2y = x
</span>
</span><span><span>600 = 2y + y
</span>
</span><span><span>600 = 3y
</span>
</span><span><span>200 = y
</span>
</span><span><span>then 600 - y = x
</span>
</span><span><span>so 600 - 200 = x
</span>
400 = x</span>
<span> So you had 400 cows and 200 bulls last year</span>
