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2 years ago

Select steps that could be used to solve the equation 1 + 3x = -x + 4.

2 answers:

4 0

Step 1) Add x to both sides and simplify
1+4x=4

Step 2) Subtract 1 from both sides
4x=3

Step 3) Divide everything by 4
x=4/3 (1 1/3) (1.333)

alexandr1967 [171]2 years ago

3 0

Answer:

add x, subtract 1, divide by 4

subtract 3x, subtract 4, divide by -4

subtract 1, add x, divide by 4

Step-by-step explanation:

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3 years ago

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3 years ago

How do you find DE, Round to nearest 10th

Sergeu [11.5K]

Answer: $DE\approx6.0$

Step-by-step explanation:

Observe in the figure given in the exercise that four right triangles are formed.

In this case you can use the following Trigonometric Identity to solve this exercise:

$cos\alpha=\frac{adjacent}{hypotenuse}$

From the figure you can identify that:

$\alpha =53\°\\\\hypotenuse=10\\\\adjacent=BE=DE$

Then, you can substitute values:

$cos(53\°)=\frac{DE}{10}$

The next step is to solve for DE in order to find its value. This is:

$10*cos(53\°)=DE\\\\DE=6.01$

Finally, rounding the result to the nearest tenth, you get that this is:

$DE\approx6.0$

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3 years ago