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Elina [12.6K]
3 years ago
15

How do you solve -6n-20=-2n+4 (1-3n)

Mathematics
1 answer:
DedPeter [7]3 years ago
3 0
-6n-20=-2n+4-12n
-6n-20=-14n+4
+6n       +6n
-20=-8n+4
-4          -4
-24=-8n
/8     /8
n=-3
         -
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IgorLugansk [536]

Answer:

1) 28.4 miles per gallon

2) 34 miles per gallon

3) the red car

Step-by-step explanation:

We have the following information:

  • <em>Blue car:</em>

<em>Travels 35 1/2 miles on 1 1/4 gallons of gasoline</em>

  • <em>Red car:</em>

<em>Travels 27 1/5 miles on 4/5 gallons of gasoline</em>

<em />

We want to know the unit rate for miles per hour, and to do it we have to divide the miles they travel by the gallons each car uses:

  • Blue car:

(35 1/2) / (1 1/4) = 28.4 miles per gallon

  • Red car:

(27 1/5) / (4/5) = 34 miles per gallon

The red car travels greater distance with 1 gallon of gasoline

8 0
4 years ago
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Anon25 [30]

Answer2:

Step-by-step explanation:

1-2

3 0
3 years ago
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What is the domain restrictions for x=-6 and x=1
slavikrds [6]

Answer:

the domain in general is negative Infinity, infinity.

Step-by-step explanation:

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8 0
3 years ago
How do I find the values of these
skad [1K]
Since the triangles are similar, then 32 = x+7 those two angles are too
solve for "x"

now using proportions   \bf \cfrac{\textit{small triangle}}{\textit{large triangle}}\qquad \cfrac{JK}{18}=\cfrac{12}{12+10}

solve for JK

\bf \cfrac{\textit{small triangle}}{\textit{large triangle}}\qquad \cfrac{12}{12+10}=\cfrac{9}{9+KG}\implies 12(9+KG)=(22)9&#10;\\\\\\&#10;108+9KG=198

solve for KG

the scale factor of the perimeter of both triangles is just the same as the ratio of the sides, or \bf \cfrac{12}{12+10}

3 0
3 years ago
A recipe calls for 3 cups of flour for 54 cookies. How much flour is needed<br> for 78 cookies?
Feliz [49]

Answer:

4 cups

Step-by-step explanation:

Because, 54 cookies divided by 3 cups equals, 18 cookies per cup. 54 cookies plus 18 cookies (aka 1 cup) equals 72 cookies for 4 cups.

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