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3 years ago

Use the functions to answer the question.

1 answer:

4 0

Composition function rule (f○g)(x) = f(g(x))
Given the separate functions: $f(x)=2x+1$ and $g(x)=x^2$

$(f\circ g)(-5)\rightarrow\text{ Composition Function Rule}\rightarrow f(g(-5))=2((5)^2)+1$
$\rightarrow2(25)+1=50+1=51$

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For the expression 6x-2y+5

Svetach [21]

Y = 3x - 2.5
You have to get the y by itself.
Subtract 6x to both sides. Then divide by -2.

5 0

4 years ago

A simple random sample of 125 SAT scores has a mean of 1522. Assume that SAT scores have a population standard deviation of 335.

Fed [463]

Answer:

$1463.3\:$

Step-by-step explanation:

Since the population standard deviation $\sigma$ , is known, we use the z confidence interval for the mean.

This is given by:

$\bar X-z_{\frac{\alpha}{2} }(\frac{\sigma}{\sqrt{n} } )\:$

For a 95% confidence interval we use $z=1.96$ .

It was also given that: $n=125$ , $\bar X=1522$ and $\sigma=335$

Let us substitute the values to get:

$1522-1.96(\frac{335}{\sqrt{125} } )\:$

$1463.3\:$

Interpretation:

We can say with 95% confidence that the interval between 1463.3 and 1580.7 SAT scores contains the population mean based on the sample 125 SAT scores.

7 0

3 years ago

Question 4(Multiple Choice Worth 2 points)

laiz [17]

Answer:

The coefficient of variable term y is -1

Step-by-step explanation:

We have an expression given in the question that is:

6 - y + 3

We have to find the coefficient of the variable term.

In mathematics, variable can be defined as any term which is to be measured. For example in the given expression, y is the variable because its value is unknown yet and it has to be measured.

Coefficients are the number the multiply the variable

For example

In 2x, x is the variable and 2 is the coefficient.

Now in the given expression, we have

6 - y + 3

6 + (-1)(y) + 3

So considering (-1)(y), the variable is y while its coefficent is -1

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3 years ago

Parallel lines t and u are cut by two transversals, r and s, which intersect line u at the same point.

Bezzdna [24]

Answer:

Step-by-step explanation:

it was right on edge

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3 years ago

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Skylar needs to buy a pair of dress pants for $40 a shirt for $30 dollars and a tie for $20

Pepsi [2]

Altogether that's $120 dollars so that's how much u need

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3 years ago

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