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Tju [1.3M]
3 years ago
14

Which equation has a solution of X= 13? O X+ 3 = 10 O x-10=3 * = 26 Ox+12= 1

Mathematics
2 answers:
Marianna [84]3 years ago
3 0

Answer:

x-10=3

x+10-10=3+10

x=13

Lina20 [59]3 years ago
3 0

Answer:

x - 10 = 3

Step-by-step explanation:

x - 10 = 3

Add 10 to both sides

x - 10 + 10 = 3 + 10

             x = 13

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How much salt should Ilya add to 810g of water to make 10% solution? How much solution will he make?
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Write the equation of the circumference that meets the condition: Center on the line: x -4y = 1 And it passes through the points
elena-14-01-66 [18.8K]

Answer:

(x + 3)² + (y + 1)² = 100

Step-by-step explanation:

Equation of a circle is:

(x − h)² + (y − k)² = r²

where (h, k) is the center of the circle and r is the radius.

The center is on the line x − 4y = 1, so:

h − 4k = 1

h = 1 + 4k

(x − 1 − 4k)² + (y − k)² = r²

Two points on the line are (3, 7) and (5, 5), so:

(3 − 1 − 4k)² + (7 − k)² = r²

(5 − 1 − 4k)² + (5 − k)² = r²

Set the equations equal:

(3 − 1 − 4k)² + (7 − k)² = (5 − 1 − 4k)² + (5 − k)²

(2 − 4k)² + (7 − k)² = (4 − 4k)² + (5 − k)²

4 − 16k + 16k² + 49 − 14k + k² = 16 − 32k + 16k² + 25 − 10k + k²

4 − 16k + 49 − 14k = 16 − 32k + 25 − 10k

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12k = -12

k = -1

h = 1 + 4k

h = -3

(3 − 1 − 4k)² + (7 − k)² = r²

(3 − 1 + 4)² + (7 + 1)² = r²

6² + 8² = r²

r = 10

Therefore, the equation of the circle is:

(x + 3)² + (y + 1)² = 10²

3 0
3 years ago
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