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Nadya [2.5K]
3 years ago
14

A direct variation has the equation y = 4x. What is the value of y for x = 3?

Mathematics
1 answer:
stepladder [879]3 years ago
3 0

Plug x=3 into y=4x

y=4(3)

y=12

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1/5

Step-by-step explanation:

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melamori03 [73]

Answer:

28/9

Step-by-step explanation:

If the roots are J and K, then:

3 (x − J) (x − K) = 0

3 (x² − (J+K)x + JK) = 0

So if we factor out the leading coefficient:

3x² − 2x − 4 = 0

3(x² − 2/3x − 4/3) = 0

The coefficient of the second term is the sum of the roots:

J + K = 2/3

And the constant is the product of the roots:

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If we take the sum of the roots and square it:

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And subtract twice the product:

J² + K² = 4/9 − 2JK

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6 0
3 years ago
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frosja888 [35]

Answer:

t \leq 63

Step-by-step explanation:

Quotient of two numbers also means the result of the two numbers after division.

If the quotient of a number t and 4.2 is at most 15., this can be expressed using the inequality;

\dfrac{t}{4.2}\leq  15 <em>(note that at most 15 means that the highest value we can have is 15 after taking the quotient of the number hence the reason of the inequality sign.)</em>

<em></em>

On solving the inequality for the variable t

\dfrac{t}{4.2}\leq  15\\\\multiply \ both \ sides \ by \ 4.2\\\\\dfrac{t}{4.2}* 4.2\leq  15 * 4.2\\\\t \leq 63

<em>Hence t is at most 63</em>

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Answer:

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Rus_ich [418]
For each x value, add 3 to get y values.
0+3=3
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Final answers, respectively: 3,5,7,9
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