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Alex17521 [72]
3 years ago
9

In a survey of 850 students in a school, 90% reported having pets at home. If the margin of error is +3.4%, what is the interval

that is likely to contain the exact percent of all people who have pets at home?
Mathematics
1 answer:
Maksim231197 [3]3 years ago
4 0

Answer:

ddd

Step-by-step explanation: ihryhnrevwrvr

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Which of the following equations have the same solution? Give reasons for your answer that do not depend on solving the equation
topjm [15]

<u>Answer:</u>

A,C and E are equal with 4 as their solution; F and B are equal with 0 as their solution. D is independent.

<u>Solution:</u>

A. -(7-4x)=9

Taking off the brackets we get,

-7+4x=9 \Rightarrow +4x=9+7

\Rightarrow 4x=16 \\

\Rightarrow x=\frac{16}{4} \Rightarrow 4

Here x=4 --- (a)

B. 12=-4(-6x-3)

Multiplying -4 inside we get,

12=+24x+12 \Rightarrow 12-12=24x

\Rightarrow x=0

Here x=0 --- (b)

C. 5x+34=-2(1-7x)

Multiplying -2 inside we get,

5x+34=-2+14x

Grouping the terms,

34+2=14x-5x \Rightarrow 36=9x

\Rightarrow x=4

Here x=4 --- (c)

D. 14=-(x-8)

\Rightarrow 14=-x+8 \Rightarrow -x=14-8

\Rightarrow x=-6

Here x=-6 --- (d)

E. -8=-(x+4)

\Rightarrow -8=-x-4 \Rightarrow x=8-4

\Rightarrow x=4

Here x=4 --- (e)

F. x+5=-5x+5

\Rightarrow x+5x=5-5

6x=0 \Rightarrow x=0

Here x=0 --- (f)

So, from the above calculations we can conclude that (a), (c) and (e) are equal and (f) and (b) are equal but (d) is independent because it has a different solution.

5 0
3 years ago
Select all that are equivalent to 3 square root -40 below
lyudmila [28]

Answer:

6 √(10) i  (the last option)

and 6i√10

Step-by-step explanation:

√-40  = √4 * √-10 = 2√(10) i

3 *  2√(10) i

= 6 √10 i

Also 6i√10  is equivalent

4 0
4 years ago
A scientist cuts a box parallel to its bases, and the resulting two-dimensional cross section is a square. Which original figure
alexdok [17]

Answer:

octagonal pyraimed and squre prims

6 0
3 years ago
What is the area of this polygon? <br><br> Pleasee help mee<br><br> I will mark brainliest!
Ira Lisetskai [31]

Answer:

60 squared inches.

Step-by-step explanation:

You can break this polygon into two parts. The rectangle part of the polygon is 55 squared inches. The triangle part is 5 squared inches.

The rectangle:

5(11)=55

The triangle:

2(5)=10\\10/2=5

Therefore, the whole polygon is 60 squared inches.

6 0
4 years ago
Why is a lame elephant like adding 19 and 4 ?
Nimfa-mama [501]
Well maybe he like the number 23 which is the answer
4 0
4 years ago
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