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3 years ago

Is x = -12 a solution of x^2 +10x+25=49?

Mathematics

1 answer:

Tresset [83]3 years ago

8 0

Answer:

Yes

Step-by-step explanation:

${x}^{2} + 10x + 25 = 49 \\ {x}^{2} + 10x + 25 - 49 = 0 \\ {x}^{2} + 10x - 24 = 0 \\ (x + 12)(x -2 ) = 0 \\ \\ x + 12 = 0 \\ x = - 12 \\ \\ \\ x - 2 = 0 \\x = 2$

I hope I helped you^_^

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Answer:

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Given u = −8i − 3j and v = −12i − 7j, what is projvu?

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Answer:

(b) -7.275i -4.244j

Step-by-step explanation:

The projection of vector u onto vector v is the product of the unit vector v, the magnitude of vector u, and the cosine of the angle between them.

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2 years ago

11+2x=x+4 whoever answered can you show the work?

Vladimir [108]

Answer:

x= -7

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

2x+11=x+4

Step 2: Subtract x from both sides.

2x+11−x=x+4−x

x+11=4

Step 3: Subtract 11 from both sides.

x+11−11=4−11

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3 years ago

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Answer:

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Step-by-step explanation:

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$(x,y)\rightarrow (y,-x)$

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According to the given rule, the image point after a rotation of 270 degrees° counterclockwise about the origin have the coordinates (40,0) (see attached diagram for details).

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3 years ago