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Lera25 [3.4K]
3 years ago
11

If f(x) = 3x +9 x when f(x) = 30

Mathematics
1 answer:
den301095 [7]3 years ago
3 0

Answer:

x=5/2

Step-by-step explanation:

When f(x)=30, we have 3x+9x=30.

Combining like terms on the right side, we have 12x=30.

Finally, dividing by 12 we get x=30/12.

We note that 30=6*5 and 12=6*2, so 30/12=5/2.

So, \boxed{x=5/2} and we're done!

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Answer:

Step-by-step explanation:

= (12 x 2) - (7 x 3)

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4 years ago
Find the range of the data below, 12, 15, 11, 15, 13, 10, 15
morpeh [17]

Answer:5

Step-by-step explanation:

range=greatest number- smallest number

greatest number=15

smallest number=10

range=15-10

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3 years ago
672,591 is closer to 700,000 than
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Read 2 more answers
Jade invested in the stock market. The weekly change in value of her stock, in dollars, over 4 weeks was +23.65, -22.20, -12.75
Anastasy [175]

Answer:

<h3>The average weekly change in value of Jade's stock in dollars is -1.3225</h3>

Step-by-step explanation:

Given that Jade invested in the stock market.

The weekly change in value of her stock, in dollars, over 4 weeks was +23.65, -22.20, -12.75 and +5.98.

<h3>To find the  average weekly change in value of her stock in dollars :</h3>

The average weekly change in value of Jade's stock is given by Average=\frac{sum of the weekly changes in value of her stock in dollars}{total number of weeks}

Average=\frac{23.65+(-22.20)+(-12.75)+5.98}{4}

=\frac{23.65-22.20-12.75+5.98}{4}

=\frac{29.63-34.92}{4}

=\frac{-5.29}{4}

=-1.3225

Therefore Average=-1.3225

<h3>Therefore the average weekly change in value of Jade's stock in dollars is -1.3225</h3>
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3 years ago
Steven, Linda, and Elliott check their lunch
zhuklara [117]

Answer:

Steven, Elliot, Linda

Step-by-step explanation:

-12<3<7

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