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3 years ago

Select all the correct answers.

Mathematics

2 answers:

Rudiy273 years ago

7 0

Answer: B and D or 2 and 4

Step-by-step explanation:

1. is NOT correct as the mean absolute deviation is 22 not 15

2. is CORRECT the mean absolute deviation is 18

the mean of A is 216

the mean of B is 215

one tenth of 215/216 is 21.5/21.6 that is about the absolute mean deviation which 18/22

Which makes one tenth the wrong answer.

This is also makes one twentieth the correct answer

lara31 [8.8K]3 years ago

3 0

Answer:

B i think

Step-by-step explanation:

i think its B because all the other ones don'e look right. hope its correct. :)

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21. For the following exercises, use the descriptions of each pair of lines given below to find the slopes of Line 1 and Line 2.

dybincka [34]

Answer:

The given lines are perpendicular.

Step-by-step explanation:

In the question, two lines are given as line 1 passes through (1,7) and (5,5). Whereas, line 2 passes through (-1,-3) and (1,1).

It is required to find the slope of given lines and figure out whether they are perpendicular, parallel or neither.

To solve this question, first find the slope of both lines. Check if their product is equal to -1, then they are perpendicular. If the slopes are equal the lines are parallel.

Step 1 of 2

Find the slope of first line.

$\begin{aligned}m_{1} &=\frac{5-7}{5-1} \\m_{1} &=\frac{-2}{4} \\m_{1} &=-\frac{1}{2}\end{aligned}$

Step 2 of 2

Find the slope of first line.

$\begin{aligned}&m_{2}=\frac{1-(-3)}{1-(-1)} \\&m_{2}=\frac{4}{2} \\&m_{2}=2\end{aligned}$

And

$\begin{aligned}&m_{1} m_{2}=-\frac{1}{2}(2) \\&m_{1} m_{2}=-1\end{aligned}$

Since, both slopes are reciprocal of each other.

Therefore, the lines are perpendicular.

6 0

2 years ago

PLEASE PLEASE HELP ME

Alexus [3.1K]

Y=-2x-2 it is the only one that is perfectly perpendicular and passes through (-3,4)

3 0

2 years ago

Which point represents the unit rate?

uysha [10]

C <span>represents the unit rate

hope that helps</span>

6 0

3 years ago

Read 2 more answers

100 points the right answer please the set designer for a play painted some background scenery on a large piece of plywood. He u

podryga [215]

Answer:

14 ft

Step-by-step explanation:

Focus on the triangle, and temporarily neglect the 2 ft measurement at the top of the triangle. Then the 2 legs of the triangle have lengths h - 2 ft and 5 ft, and the hypotenuse is 13.

Applying the Pythagorean Theorem, we get:

13^2 = (h - 2)^2 + 5^2, or

169 = h^2 - 4h + 4 + 25, or

144 = h^2 - 4h + 4, or

140 = h^2 - 4h, or, finally,

h^2 - 4h - 140 = 0. We must find the value of h.

I graphed this function on a calculator and found that -10 is a zero. Thus, the function factors into (h + 10)(h - 14) = 0, or h = 14.

The total height of the piece of plywood is 14 ft.

Check this: does a right triangle with legs (14 - 2) and 5 have a hypotenuse of 13? Yes.

7 0

3 years ago

Kelsey told her hired hand Hanna to gather eggs from the henhouse. Hanna collected 30 eggs and brought

CaHeK987 [17]

Answer:

12 eggs

Step-by-step explanation:

Total no. of eggs collected=30

Percentage of eggs broken=40%

No. of eggs still good:-

40/100×30

=)0.4×30

=)12eggs

PLS MARK ME AS BRAINLIEST

5 0

2 years ago