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3 years ago

Variable y varies directly with variable x, and y = 18 when x = 4.

Mathematics

1 answer:

mart [117]3 years ago

7 0

The constant of variation is 18/4 = 9/2= 4.5

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A video game is on sale for 15% off the list price of $50. How much is saved by buying the game at the sale price?

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Answer:

Step-by-step explanation:

$Original price = \$50\\Discount = 15\%\\\\\frac{15}{100} \times 50\\ = \$7.5\\$

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3 years ago

A car travels 182 miles in 3 hours and 15 minutes. How many miles does it travel per hour?

timofeeve [1]

57 miles about I'm not positive but I think this is right

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4 years ago

If f(x) = x^3 find df/dx | x= -5

asambeis [7]

Answer:

Step-by-step explanation:

So we have:

$f(x)=x^3$

Take the derivative of the function. Use the power rule, which states that:

$\frac{d}{dx}(x^n)=nx^{n-1}$

Therefore:

$\frac{d}{dx}[f(x)]=\frac{d}{dx}[x^3]$

Use power rule:

$\frac{df}{dx}=3x^2$

Now, substitute in -5:

$3(-5)^2$

Square and multiply:

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This means that the slope of the line tangent to the point (-5,-125) on the graph x^3 is 75.

And we're done!

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3 years ago

At the grand opening of a new store, every 4th customer will receive a balloon and every 6th customers will receive a $10 gift c

andrezito [222]

The twelfth customer would receive both

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3 years ago

Read 2 more answers

A spinner is divided into four sections of equal size, numbered 1, 2, 3, and 4. You spin it three times, and get 1, 4, and 3. Wh

N76 [4]

Answer:

hello your question lacks the required statements here are the statements

A spinner is divided into four sections of equal size, numbered 1, 2, 3, and 4. You spin it three times, and get 1, 4, and 3. Which statement is FALSE?

A. The theoretical probability of a 1 is 25%.

B. The experimental probability of a 1 is 25%.

C. If you spin the same spinner again and get different results, the experimental probabilities are different, but the theoretical probabilities have not changed.

D. The experimental probability of a 2 is 0%.

Answer : The experimental probability of a 1 is 25% ( B )

Step-by-step explanation:

The first statement is true because since the spinner is divided into 4 sections the theoretical probabilty is equal for all sections i.e 25% each

The second statement is false because after spinning the spinner three times ( experimental ) the results obtained were 1,4,3 hence the experimental probability of 1 would be 33.3%

the theoretical probabilities remains unchanged but the experimental probabilty can change

the experimental probabilty of 2 is 0% because after the 3 experiments the number 2 did not show up

7 0

4 years ago