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Alex
3 years ago
14

So I need the work shown on this too 2x+4=-7x+6

Mathematics
1 answer:
vichka [17]3 years ago
8 0

Answer:

2x+4=-7x+6

+7x +7x

9x+4=6

-4 -4

9x=2

2 2

x=4.5

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a paint mixture contains 32 gallons of base for every gallon of color. In 924 gallons of paint, how many gallons of color are th
expeople1 [14]
<span>base and color are in a ratio of 32:1, where color is "x"
924-x/x=32/1
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8 0
3 years ago
Is 1/2 greater or less than 2/3
Verdich [7]

Answer:

Step-by-step explanation:

Divide so you get a decimal. 1/2 = 0.5. 2/3 = 0.666

0.666 > 0.5

So 1/2 is less than 2/3

4 0
3 years ago
Read 2 more answers
What are the center and radius of the circle defined by the equation x^2 + y^2 -6x + 8y + 21=0
NeTakaya

Answer:

Step-by-step explanation:

(x²-6x)+(y²+8y)=-21

(x²-6x+9)+(y²+8y+16)=-21+9+16

(x-3)²+(y+4)²=4

center=(3,-4),radius=√4=2

7 0
2 years ago
Solve the system by substitution.<br> [-2.5x+y = 13.5<br> 12.25x - y=-12.25
IrinaK [193]

Answer:

x = 5/39 , y = 539/39

Step-by-step explanation:

Solve the following system:

{y - 2.5 x = 13.5

12.25 x - y = -12.25

In the first equation, look to solve for y:

{y - 2.5 x = 13.5

12.25 x - y = -12.25

y - 2.5 x = y - (5 x)/2 and 13.5 = 27/2:

y - (5 x)/2 = 27/2

Add (5 x)/2 to both sides:

{y = 1/2 (5 x + 27)

12.25 x - y = -12.25

Substitute y = 1/2 (5 x + 27) into the second equation:

{y = 1/2 (5 x + 27)

1/2 (-5 x - 27) + 12.25 x = -12.25

(-5 x - 27)/2 + 12.25 x = 12.25 x + (-(5 x)/2 - 27/2) = 9.75 x - 27/2:

{y = 1/2 (5 x + 27)

9.75 x - 27/2 = -12.25

In the second equation, look to solve for x:

{y = 1/2 (5 x + 27)

9.75 x - 27/2 = -12.25

9.75 x - 27/2 = (39 x)/4 - 27/2 and -12.25 = -49/4:

(39 x)/4 - 27/2 = -49/4

Add 27/2 to both sides:

{y = 1/2 (5 x + 27)

(39 x)/4 = 5/4

Multiply both sides by 4/39:

{y = 1/2 (5 x + 27)

x = 5/39

Substitute x = 5/39 into the first equation:

{y = 539/39

x = 5/39

Collect results in alphabetical order:

Answer: {x = 5/39 , y = 539/39

5 0
3 years ago
How many different committees can be formed from 7 people if each committee must consist of at least 3 people?
Otrada [13]

Answer: 2 committees

Step-by-step explanation: 7 cant be divided evenly by 3. only two times. Only 2 groups can be fully formed.

5 0
3 years ago
Read 2 more answers
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