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Sedbober [7]
3 years ago
13

In class, 5/9 of the students have blue Eyes. if 10 students have blue eyes, how many students are in the class in total?

Mathematics
2 answers:
KiRa [710]3 years ago
8 0
Let us cross multiply.

5/9=10/x

9 x 10= 5x

90=5x

90 <u />÷ 5= 5x <span>÷ 5

18=x

So, the answer is 18. I hope this helped you, since I just learned cross multiplication last week.</span>
My name is Ann [436]3 years ago
5 0
x-\ all\ students\\\\&#10;\frac{5}{9}x=10\ \ \ \ | divide\ by\ \frac{5}{9}\\\\x=10*\frac{9}{5}=18\\\\&#10;There\ are\ 18\ students\ in\ class.
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OlgaM077 [116]

Answer:

  • <u><em>P = 0.40x + 0.50y</em></u>

Explanation:

The <em>objective function</em> is the function that you want to optimize: usually minimize in the case of costs, and maximize in the case of revenues or profits.

In this case, you know the <em>profits</em> that a manufacturer earns from two types of <em>bottled coffe drinks</em>: <em>cappuccinos</em> and <em>cafés au lait</em>.

Each bottle of <em>cappuccino earns a profit of $0.40</em> and each bottle of <em>café au lait earns a profit of $0.50</em>.

Then:

  • using the variable x for the number bottles of cappuccino produced, the profit earned from x bottles is 0.40x, and

  • using the variable y for the number of bottles of café au lait the produced, the profit earned from y bottles is 0.5y.

The total profit earned, P, is the sum of the profits earned from each type of bottled coffee drinks:

  • P = 0.40x + 0.50y

That is the <em>objective function</em>, i.e. the function that the manufacturer must try to maximize subject to the corresponding constraints.

7 0
2 years ago
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Let's see who can do this!
aliina [53]

Answer:

28

Step-by-step explanation:

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<h3>1 PENCIL = 1/7 of pack.</h3>

∴ 1 pack has 1/7 multiplied by X.

X/7 = 1, so X is 7.

AND THEREFORE 4 PACKS CONTAIN 7*4 = 28

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3 years ago
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miv72 [106K]

Answer:

F= 180 - (127°+33.5°)

180- 160.5

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Step-by-step explanation:

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scoray [572]

Answer:

34x + 45y = 192.25

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Step-by-step explanation:

Let x stand for peaches.

Let y stand for grapes.

Since we know that yesterday he sold 35 pounds of peaches ( x ) and 45 pounds of grapes ( y ) for $192.25, we can create an equation to represent this using two variables; peaches and grapes.

We can do the same thing with the amount of peaches and grapes he sold today. Once we make this equation, we will have two equations to make the system of equations to solve for x and y.

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Answer: okay so first solve for x which is going to be x=10

Step-by-step explanation:

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