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V125BC [204]
3 years ago
13

Help please help please

Mathematics
2 answers:
Hunter-Best [27]3 years ago
8 0
<h2>Answer:</h2>

<u>The correct choice is</u><u> (A) 18 $</u>

<h2>Step-by-step explanation:</h2>

Total paint used is 1.25 + 3.25 = 4.25 gallons

Total money spent on paint = $81

Money used per gallon = $81 / 4.25 gallons

Money used per gallon = $18

which is option A

Radda [10]3 years ago
5 0

Answer:

A

Step-by-step explanation:

Martin bought 4.5 gallons of red paint (3.25 for the barn, and 1.25 for his shed). The total money he spent on 4.5 gallons of paint was 81 dollars.  

So if 4.5 gallons cost 81 dollars, 1 gallon would cost 81/4.5  

= 18 dollars

Hope this helps!

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(x+6)(x+3) = x²+6x+3x+18<br> What’s the proof here ?
avanturin [10]
All real numbers

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your equation now looks like this:

x^2+6x+3x+18= x^2+6x+3x+18

because the equations are equal, the answer is all real numbers
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How to find the depth of a triangle
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Expand.<br> Your answer should be a polynomial in standard form.<br> (9+ m)(-m +9)=
valina [46]

Answer: -1m²+81

Step-by-step explanation:

correct standard form means that the terms are ordered from biggest exponent to lowest exponent.The leading coefficient is the coefficient

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6 0
3 years ago
In the equation x^2+kx+54=0 one root is twice the other root find k
Maurinko [17]
Let r be the lesser root and r^2 be the greater.......the sum of the roots   = -b/a  = -[-6] / 1  = 6

 

So we have that

 

r^2 + r  = 6     →    r^2 + r - 6 = 0      

 

Factor

 

(r + 3) (r - 2)   = 0  

 

So r = -3    or   r = 2

 

Then r^2  = 9     or r^2  =4

 

And the product of the roots =  c/a   =  k/a  = k

 

So....k =   (-3)(9)   = -27     or k = (2)(4)  = 8

 

Check

 

x^2 - 6x - 27  = 0      factors as  (x + 3)(x - 9) = 0     and  the roots are -3 and 9

 

x^2 - 6x + 8  = 0      factors as (x -2) (x - 4) =0      and the roots are 2 and 4

 

6 0
3 years ago
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