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Harlamova29_29 [7]
3 years ago
9

What’s the solution to -5x-y=21 when y is equal to 6+4x

Mathematics
1 answer:
agasfer [191]3 years ago
3 0

Answer:

x= -3, y=-6

Step-by-step explanation:

In the equation -5x-y=21, substitute y for 6+4x:

-5x- (6+4x) = 21

^^Solve for x.

X should come out to -3. To find y, plug -3 into either equation (-5x-y=21 or y=6+4x) and y should equal -6.

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Day and Night Kennel charges $20 per day plus a one-time food fee of $15 to board a pet. Bark Time Hotel charges $30 per day plu
BaLLatris [955]

Answer:

See below.

Step-by-step explanation:

Let <em>x</em> represent the number of days.

Since Day and Night Kennel charges a fee of $20 per day and only a one-time fee of $15:

y=20x+15

Where <em>y</em> represents the total cost, <em>20x</em> represents the cost for staying <em>x</em> days and <em>15</em> is the initial one-time fee.

For Bark Time Hotel, similarly:

y=30x+5

Again, <em>y</em> represents the total cost, <em>30x</em> represents the cost for staying <em>x</em> days, and <em>5</em> is the initial one-time fee.

Thus, the system of equations is:

y=20x+15\\y=30x+5

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3 years ago
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7 0
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C − 5.5 ≤ 5.5 inequality
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Answer:

c\leq 11

Step-by-step explanation:

5 0
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D=2730 mi t=9.75 h find r
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3 years ago
What is the equation of a circle with a center located at (-3, 4) and a diameter of 14?
AnnZ [28]

Answer: (x + 3)^2 + (y - 4)^2 = 49

Step-by-step explanation:

The equation of a circle given the center and radius: (x - h)^2 + (y - k)^2 = r^2

Given: center (-3,4) ; h = -3 and k = 4

diameter = 14

To find the radius: divide the diameter by 2 = 14/2 = 7 = r

Center: (-3,4) and radius: 7

Equation of a circle: (x - h)^2 + (y - k) ^2 = r^2

Substitute h = -3, k = 4, r = 7

(x - (-3))^2 + (y - 4)^2 = 7^2

Answer:

Equation of the circle: (x + 3)^2 + (y - 4)^2 = 49

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4 years ago
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