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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?

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.

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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

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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

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Answer:

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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:

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Therefore, the whole polygon is 60 squared inches.

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Why is a lame elephant like adding 19 and 4 ?

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Well maybe he like the number 23 which is the answer

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