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tresset_1 [31]
3 years ago
6

Susan, Deon, and Goran have a total of $153 in their wallets. Goran has 4 times what Deon has. Deon has $9 less than Susan. How

much do they have in their wallets?
Mathematics
2 answers:
yaroslaw [1]3 years ago
6 0

Answer:

$153

Step-by-step explanation:

Zolol [24]3 years ago
5 0

Answer:

153

Step-by-step explanation:

Well I don't know if this is a trick question or a mistake but you wrote how much do they have in their wallets. They symbolizes all of them. So its 153. If this is a mistake comment back and I will help you.

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2 years ago
The total cost (in dollars) for a company to manufacture and sell x items per week is C = 40 x + 640 , whereas the revenue broug
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Answer:

The company must sell 60 or 70 items to obtain a weekly profit of 200.

Step-by-step explanation:

The profit is the difference between the revenue and the cost of a given task, therefore:

\text{profit} = R - C\\\text{profit} = 66*x - 0.2*x^2 - (40*x + 640)\\\text{profit} = 66*x - 0.2*x^2 - 40*x - 640\\\text{profit} = - 0.2*x^2 + 26*x - 640

To have a profit of 200, we need to sell:

-0.2*x^2 + 26*x - 640 = 200\\-0.2*x^2 + 26*x -840 = 0\text{ } *\frac{-1}{0.2}\\x^2 -130 + -4200 = 0\\x_{1,2} = \frac{-(-130) \pm \sqrt{(-130)^2 - 4*1*(-4200)}}{2*1}\\x_{1,2} = \frac{130 \pm \sqrt{16900 + 16800}}{2}\\x_{1,2} = \frac{130 \pm \sqrt{100}}{2}\\x_{1,2} = \frac{130 \pm 10}{2}\\x_{1} = \frac{130 + 10}{2} = \frac{140}{2} = 70\\ x_{2} = \frac{130 - 10}{2} = \frac{120}{2}  = 60

The company must sell 60 or 70 items to obtain a weekly profit of 200.

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