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sergejj [24]
3 years ago
11

Martin needs 3.25 gallons of red paint for his small barn and 1.25 gallons of paint for his shed. He spends $81 on paint. How mu

ch does the paint cost per gallon?
Mathematics
2 answers:
alina1380 [7]3 years ago
4 0

Answer:

18

Step-by-step explanation:

3.25 + 1.25 = 4.5

81 / 4.5 = 18

muminat3 years ago
3 0

Answer:

A. $18.00

Step-by-step explanation:

I took the test.

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Answer:

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3 years ago
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Solve using the quadratic formula 2x^2+8x-5=0
Ede4ka [16]

Step-by-step explanation:

Hey there!!

Given,

{x}^{2}  + 8x - 5 = 0

Comparing it with ax^2+bx+c =0 we get,

a= 1, b= 8, c= -5.

Using formula,

x =  \frac{ - b +  -  \sqrt{ {b}^{2} - 4ac } }{2a}

Keep all values,

x =   \frac{ - 8 +  -  \sqrt{ {8}^{2}  - 4 \times 1 \times ( - 5)} }{2 \times 1}

x =  \frac{ - 8 +  -   \sqrt{64 + 20}  }{2}

x =    \frac{ - 8 +  -  \sqrt{84} }{2}

x =  \frac{ - 8 +  - 2 \sqrt{21} }{2}

Taking negative,

x =   \frac{ - 8 - 2 \sqrt{21} }{2}

x =   \frac{ - 2(4 +  \sqrt{21}) }{2}

x = 4 +  \sqrt{21}

Similarly, taking positive,

x =  \frac{ - 8 + 2 \sqrt{21} }{2}

x =  \frac{ - 2(4 -  \sqrt{21} ) }{2}

x = 4 -  \sqrt{21}

Therefore, x= (4 + root 21, 4 - root 21).

<em><u>Hope it helps</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em><em><u>.</u></em>

3 0
3 years ago
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bearhunter [10]

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5 0
3 years ago
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Beth is purchasing chocolate and vanilla ice cream cups for a birthday party. She needs a total of 24 ice cream cups and twice a
frez [133]
constraint 1
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 x = number of cups of chocolate
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6 0
3 years ago
97. An elevator in a tall building goes up 7 floors, then
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so, start floor = x

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