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3 years ago

Please help me in this:

Mathematics

1 answer:

Svetlanka [38]3 years ago

4 0

What exactly do you need help with?!

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What is the answer to 3x+8y+13x

vovikov84 [41]

Collect the like terms
3x+13x=16x
16x+8y

4 0

3 years ago

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On a coordinate plane, a graph of a floor function has horizontal segments that are each 1 unit long. The left end of each segme

UNO [17]

Answer: Over the interval <u> x = 2≤ x <3,</u> y = 2.

For an input value of –1.5, the corresponding output value is <u>-2</u>

Step-by-step explanation: Easier to find the information of you make a sketch of the graph described. (Good description!)

To find the value, look at the graphed segments that correspond to the given values.

X represents input values, Y represents output values.

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3 years ago

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A random sample of 28 statistics tutorials was selected from the past 5 years and the percentage of students absent from each on

Zielflug [23.3K]

Answer:

The 90% confidence interval using Student's t-distribution is (9.22, 11.61).

Step-by-step explanation:

Since we know the sample is not big enough to use a z-distribution, we use student's t-distribution instead.

The formula to calculate the confidence interval is given by:

$\bar{x}\pm t_{n-1} \times s/\sqrt{n}$

Where:

$\bar{x}$ is the sample's mean,

$t_{n-1}$ is t-score with n-1 degrees of freedom,

$s$ is the standard error,

$n$ is the sample's size.

This part of the equation is called margin of error:

$s/\sqrt{n}$

We know that:

$n=28$

$\bar{x}=10.41$

degrees of freedom $= 27$

$1-\alpha = 0.90 \Rightarrow \alpha = 0.10$

$t_{n-1} = 1.703$

$s = 3.71$

Replacing in the formula with the corresponding values we obtain the confidence interval:

$\bar{x}\pm t_{n-1} \times s/\sqrt{n} = 10.41 \pm 1.70 \times 3.71/\sqrt{28} = (9.22, 11.61)$

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8 0

3 years ago

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How do you get the right answer?

timama [110]

500 * (1+0.0202/12)^60) = 553.09

6 0

3 years ago

Kite K L M N is shown. The lengths of sides L M and M N are congruent. The lengths of L K and K N are congruent. Angle K is 99 d

Tresset [83]

Answer

$\angle \ LMN=49\textdegree$

Step-by-step explanation:

The diagonals of kite KLMN meet at 90°

Since, LK and KN are congruent, $\angle KLM$ and $\angle KNM$ form a set of opposite congruent angles. Congruent angles are equal.

All interior angles of a kite add up to 180°, therefore:-

$\angle LMN=360\textdegree - 2\times106\textdegree-99\textdegree\\=49\textdegree$

3 0

3 years ago

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