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Daniel [21]
3 years ago
15

Evaluate the expression 3d if d =5

Mathematics
2 answers:
s2008m [1.1K]3 years ago
4 0
Well if d=5 than 3d must equal 15.
What we do is simply turn D into 5, then since there is no sign in between, we multiply 3 and 5.
Vinvika [58]3 years ago
3 0

Answer:

15

Step-by-step explanation:

since 3d is multiplying, it would be set up as 3*5=15

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Which are correct representations of the inequality –3(2x – 5) < 5(2 – x)? Select two options.
avanturin [10]

The correct simplified inequality is - 6x + 15 < 10 - 5x and the number line representation is "an open circle is at 5 and a bold line starts at 5 and is pointing to the right".

The given inequality is -3(2x - 5) < 5(2 - x)

We need to simplify the inequality.

<h3>What is inequality?</h3>

In mathematics, inequality is a statement of an order relationship greater than, greater than or equal to, less than, or less than or equal to between two numbers or algebraic expressions.

Consider LHS and simplify -3(2x - 5) = -3(2x)-5(-3)

⇒ -3(2x - 5) = - 6x + 15 [∵(-)(-) = (+)]

Consider RHS and simplify 5(2 - x) = 5(2) + 5(-x)

⇒5(2 - x) = 10 - 5x [∵(+)(-) = (-)]

Now, - 6x + 15 < 10 - 5x

By subtracting 15 from both sides, we get

- 6x < -5 - 5x

By adding 5x to both sides, we get - x < - 5

The coefficient of x is -1. So, divide both sides by -1

Then we get x > 5

Hence, the correct simplified inequality is - 6x + 15 < 10 - 5x and the number line representation is "an open circle is at 5 and a bold line starts at 5 and is pointing to the right".

To learn more about inequalities visit:

brainly.com/question/20383699.

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5 0
1 year ago
If x&gt;2, then x^2-a-6 / x^2-4=
nadezda [96]
We know that x > 2 ( or : x ≠ +/- 2 )
We have to factorize the numerator and the denominator:
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x ² - 4 = ( x - 2 ) ( x + 2 )
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