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VMariaS [17]
2 years ago
8

If a store is selling 3 bottles of water for $3.24. how much would 8 bottles of water cost

Mathematics
1 answer:
Alex Ar [27]2 years ago
3 0

Answer:

$8.64

Step-by-step explanation:

Divide 3.24 by three to get the codt of one bottle,$1.08. multiply $1.08 by 8 and we get $8.64.

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___HC2H3O2 + ___KNO2 → ___KC2H3O2 + ___HNO2
Furkat [3]

Let a, b, c, d be coefficients for the balanced reaction:

a HC₂H₃O₂ + b KNO₂   →   c KC₂H₃O₂ + d HNO₂

Count the elements among the reactants and products:

H: 4a = 3c + d

C: 2a = 2c

O: 2a + 2b = 2c + 2d

K: b = c

N: b = d

Suppose we let b = 1. Then both c = 1 and d = 1, and in the O equation we have

2a + 2 = 2 + 2   ⇒   2a = 2   ⇒   a = 1

(Note that the equations for H and C also hold up.)

So the balanced reaction is simply

1 HC₂H₃O₂ + 1 KNO₂   →   1 KC₂H₃O₂ + 1 HNO₂

5 0
2 years ago
A motel has 20 rooms. If the manager charges $60 per room per night, all the rooms will be rented. For each $5 increase, one les
serious [3.7K]

Answer:

Rent: $80

Revenue: $1280

Step-by-step explanation:

We can solve this by representing the problem as an expression and finding the maximum of that

We know that revenue = number of sales * average price. If x represents the amount of 5 dollar increases, then we subtract x from 20 to get the total number of sales. For example, if there was 1 5 dollar increase, the number of sales would be 20-1 = 19. Similarly, the average price is equal to 60 + 5x, as we add $5 for each x. For example, if there were 3 $5 increases, it would cost 60 + 3 * 5 = 75 per room.

Therefore,

revenue = (20-x) * (60 + 5x)

= 1200 + 100x - 60x - 5x²

= -5x²+40x+1200

This is a quadratic expression -- we know it is one because it is of form ax²+bx+c, where a=-5, b=40, and c = 1200. Because the a is negative, the quadratic expression (which forms a parabola) opens downward, meaning that there is a peak of the expression at its vertex.

The x value of the vertex of a parabola given this form for the quadratic expression is (-b/2a) , which is (-40/(2*(-5))) = -40/-10 = 4 here, and plugging that into our equation,

y= -5x²+40x+1200

= -5 (4)²+40(4) + 1200

= -5 * 16 + 160 + 1200

= 1280 as our maximum revenue

Therefore, the amount of 5 dollar increases is 4, making the average price equal to 60 + 5 * 4 = 80 dollars

5 0
2 years ago
Marsha is determining what her gross pay at the end of the week should be. if she gets paid $10.15 per hour and works 17 hours,
Degger [83]

your answer would be $171.55 because of all the hours you did and you calculate all of them together you get the amount of money you get fcor working

5 0
3 years ago
Plz i need the answer
Brut [27]

(a)1/10

(b)4/5

(c)1/20

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3 years ago
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Circle the accented syllable in each underlined word
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