18*(1/3) (or one third of eighteen) = 6 dogs
Given that <span>Lisa had 1,750 stamps and Mark had 480 fewer stamps than Lisa.</span>
Thus, the number of stamps Mark had is 1,750 - 480 = 1,270
Given that <span>Lisa gave some stamps to Mark which makes Mark to have three times as many stamps as Lisa.</span>
Let the number of stamps that Lisa gave to Mark be x, then
Thus, Lisa gave Mark 995 stamps.
Therefore, the number of stamps that Lisa have now is 1,750 - 995 = 755.
The answer can be readily calculated using a single variable, x:
Let x = the amount being invested at an annual rate of 10%
Let (8000 - x) = the amount being invested at an annual rate of 12%
The problem is then stated as:
(x * 0.10) + ((8000 - x) * 0.12) = 900
0.10(x) + ((8000 * 0.12) - 0.12(x)) = 900
0.10(x) + 960 - 0.12(x) = 900
0.10(x) - 0.12(x) = 900 - 960
-0.02(x) = -60
-0.02(x) * -100/2 = -60 * -100/2
x = 6000 / 2
x = 3000
Thus, $3,000 is invested at 10% = $300 annually; and $8,000 - $3,000 = $5,000 invested at 12% = $600 annually, which sum to $900 annual investment.
Answer:
Step-by-step explanation: