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3 years ago

The value of y varies directly with x. If x = 3, then y = 4. What is the value of x when y = 120 ?

Mathematics

2 answers:

Marizza181 [45]3 years ago

8 0

Answer:

x = 90

Step-by-step explanation:

If x = 3 and y = 4 then when y = 120 just find out what times 4 = 120

which is 30.

so just multiply 30 for x = 3, then the answer will be 90

x = 90

Over [174]3 years ago

5 0

Answer:

x=90

Step-by-step explanation:

x is directly proportional to y

Therefore, if the initial y value was 4 and the final y value is 120. This means that y initial had been multiplied 120/4 times, which is 30.

Same goes for x. If x initial is 3, then the final x value would be x/3=30. This means that x=3×30, which is equal to 90.

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Given :

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The value of f(x) when x= -3, x= 0 and x=1.

Solution :

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3 years ago

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Answer:

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Step-by-step explanation:

* Let us explain a very important point in solving inequality

- When you multiply or divide an inequality by negative number we

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- Ex:

∵ 2 < 3

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inequality will be -2 < -3 and this is completely wrong, so we must

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* Now let us solve the problem

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∴ x < 4

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- Divide both sides by -5 and remember to reverse the symbol of the

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∴ x > -4

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∴ -4 < x < 4

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- Interval notation is a way of writing the solutions of inequalities

( , ) if x does not equal the end numbers

[ , ] if x equals the end numbers

[ , ) , ( , ] if x equals one of the two end numbers

* The interval notation of the solution is (-4 , 4)

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2 years ago

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<u>Step-by-step explanation:</u>

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