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3 years ago

Solve for x.this is for the k12 test.

Mathematics

2 answers:

Paladinen [302]3 years ago

5 0

Answer:

option D

Step-by-step explanation:

$\sqrt{10x+50}=x+5\\\\(\sqrt{10x+50})^2=(x+5)^2\\\\10x+50=x^2+10x+25\\\\0=x^2+10x-10x+25-50\\\\0=x^2-25\\\\0=(x-5)(x+5)\\\\x=5\\\\x=-5$

now trying for the original equation

$\sqrt{10(5)+50}=5+5\\\\\sqrt{50+50}=10\\\\\sqrt{100}=10\\\\10=10$

and

$\sqrt{10(-5)+50}=-5+5\\\\\sqrt{-50+50}=0\\\\\sqrt{0}=0\\\\0=0$

so it's option D

Sidana [21]3 years ago

3 0

Answer:

Step-by-step explanation:

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I need help Question 2 (1 point)

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Answer:

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Step-by-step explanation:

Each side of the triangle is 1 unit. When putting 10 triangles together in figure 10, there will be 12 sides on the perimeter. Therefore, your answer is 12 units.

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3 years ago

The measure of the angles of a triangle are in the extended ratio of 3 : 7 : 10. Find the measures of the angles.

olga2289 [7]

Answer:

A. 27 degrees, 63 degrees, 90 degrees.

Step-by-step explanation:

Let the angle of the triangle be x

Given the following data;

3 : 7 : 10 = 3x : 7x : 10x

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Therefore, the ratio of the angles of the triangle is 27° : 63° : 90°.

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3 years ago

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3 years ago

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Answer:

Step-by-step explanation:

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4 years ago

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Lynna [10]

Answer:

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Step-by-step explanation:

$\sf \implies \dfrac{a - b}{b} = \dfrac{3}{7} \\ \\ \sf \implies \frac{a}{b} - \frac{b}{b} = \frac{3}{7} \\ \\ \sf \implies \frac{a}{b} - 1 = \frac{3}{7} \\ \\ \sf \implies \frac{a}{b} - 1 + 1 = \frac{3}{7} + 1 \\ \\ \sf \implies \frac{a}{b} = \frac{3}{7} + 1 \\ \\ \sf \implies \frac{a}{b} = \frac{3}{7} + \frac{7}{7} \\ \\ \sf \implies \frac{a}{b} = \frac{3 + 7}{7} \\ \\ \sf \implies \frac{a}{b} = \frac{10}{7}$

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3 years ago

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Solve for x.this is for the k12 test.​

Solve for x.this is for the k12 test.