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3 years ago

What are 3 math equations for x=-3

Mathematics

2 answers:

harina [27]3 years ago

5 0

Multiply both sides by any number you want. I'll pick 2

x = -3 turns into 2x = -6 after doing so

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Add anything you want to both sides. I'll pick 7

x = -3 turns into x+7 = 4 after doing so

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you can do a combination of both multiplication and addition, as long as you do the same thing to both sides. First I'll do multiplication. I'm going to multiply both sides by 2 first

x = -3 turns into 2x = -6

then I'm going to add 7 to both sides

2x = -6 turns into 2x+7 = 1

If you were to solve 2x+7 = -1, then you'd get to x = -3 again

As a check, replace x with -3 and we have...

2x+7 = 1

2(-3)+7 = 1

-6+7 = 1

1 = 1

we get a true statement, which helps confirm we have the right equation.

Serhud [2]3 years ago

4 0

Answer:

I only know one -3x + 10 = 1

Step-by-step explanation:

1 + -10 =-9

3x= -9

x =-3

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In right triangle DEF, it is known that Cos D = (12/13) and Cos F = (5/13). If FD = 39, then DE = ? Hint, draw the right triangl

AnnyKZ [126]

Answer:

The value of the line segment $ED$ is 36.

Step-by-step explanation:

The hypotenuse represents the longest side in the right triangle. In this case, FD represents the hypotenuse as it is a multiple of 13. Based on the trigonometric relations described in the statements, we get the following relationships by definition of cosines:

$\cos D = \frac{ED}{FD}$ (1)

$\cos F = \frac{EF}{FD}$ (2)

If we know that $\cos D = \frac{12}{13}$ and $FD = 39$ , then the length of the line segment $ED$ is:

$ED = FD\cdot \cos D$

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3 years ago

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shtirl [24]

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3 years ago

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faltersainse [42]

Answer:

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Hope this helped :)

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2 years ago

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Rama09 [41]

Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

Can someone help me with this math question and can you explain it to? If so that would be great :)

Rainbow [258]

Answer:

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Step-by-step explanation:

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