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3 years ago

Let f(x) = -2x + 4 and g(x) = 5x - 7. Find f(x) - g(x).

Mathematics

1 answer:

balandron [24]3 years ago

4 0

Answer:

If you are just looking for a simplified answer then the answer is -7x - 3.

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You produce elastic bracelets that cost 25 cents to make. Your friend tells you to charge a price of 10 cents for each bracelet.

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1.20 will be used to make it for 5 cell 5 and you get 50 cents back so no profit is made

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3 years ago

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Simplify 3 square root of 512

Karolina [17]

Answer:

Step-by-step explanation:

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2 years ago

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What 2 numbers should be used to find 231 - 198 using the 10 method for subtracting quickly in your head?

Airida [17]

Answer: "Count 2 and then count 31 more."

Step-by-step explanation:

We have the equation:

231 - 198

Now, the negative number is kinda ugly, so i will write it as:

200 - 2 = 198

Is a lot easier work with 200 and 2, than with 198.

Then the equation is now:

231 - (200 - 2)

And the left number we also have a "200", so it can be written as:

200 + 31 = 231

As this is a sum, we can ignore the parentheses.

200 + 31 - 200 + 2

31 + 2

Then the correct option is:

"Count 2 and then count 31 more."

4 0

3 years ago

In a survey of 603 adults, 98 said that they regularly lie to people conducting surveys. Create a 99% confidence interval for th

marysya [2.9K]

Answer:

The population proportion is estimated to be with 99% confidence within the interval (0.1238, 0.2012).

Step-by-step explanation:

The formula for estimating the population proportion by a confidence interval is given by:

$\hat{p}\pm z_{\alpha /2}\times\sqrt{\frac{\hat{p}\times(1-\hat{p})}{n}}$

Where:

$\hat{p}$ is the sample's proportion of success, which in this case is the people that regularly lie during surveys,

$z_{\alpha /2}$ is the critical value needed to find the tails of distribution related to the confidence level,

$n$ is the sample's size.

First we compute the $\hat{p}$ value:

$\hat{p}=\frac{successes}{n}=\frac{98}{603}=0.1625$

Next we find the z-score at any z-distribution table or app (in this case i've used StatKey):

$z_{\alpha /2}=2.576$

Now we can replace in the formula with the obtained values to compute the confidence interval:

$\hat{p}\pm z_{\alpha /2}\times\sqrt{\frac{\hat{p}\times(1-\hat{p})}{n}}=0.1625\pm 2.576\times\sqrt{\frac{0.1625\times(1-0.1625)}{603}}=(0.1238, 0.2012)$

5 0

3 years ago

2 ( -2w - 1.2 + 7x) =

PSYCHO15rus [73]

Hope this will help u...:)

8 0

3 years ago