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zaharov [31]
3 years ago
14

What is the value of the expression? -0.75-(-2/5)+0.4+(-3/4)

Mathematics
1 answer:
bearhunter [10]3 years ago
8 0
-0.75-\left(-\dfrac{2}{5}\right)+0.4+\left(-\dfrac{3}{4}\right)=-0.75+\dfrac{2}{5}+0.4-\dfrac{3}{4}\\\\=-0.75+\dfrac{2\cdot2}{5\cdot2}+0.4-\dfrac{3\cdot25}{4\cdot25}=-0.75+\dfrac{4}{10}+0.4-\dfrac{75}{100}\\\\=-0.75+0.4+0.4-0.75=-(0.75+0.75)+(0.4+0.4)\\\\=-1.5+0.8=-0.7
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The following item appears on a survey: "On a five-point scale, where 1 is strongly disagree, 2 is disagree, 3 is neither agree
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Answer:

Likert Scale Question Format

Step-by-step explanation:

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4 0
3 years ago
Read 2 more answers
Help plz:))) I’ll mark u brainliest <br> ASAP!!!
Mandarinka [93]

Answer:

x=9

Step-by-step explanation:

80+6x+16=17x-3

=>17x-3-6x-16=80

=>11x-19=80

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=>11x=99

=>x=99/11

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4 0
3 years ago
Solv for x for all of these 1. 3x+6=21 2. 33=7x-9 3. 28=7+x need to know now please help !!!!!!
-Dominant- [34]

Answer:

<h3>\boxed{ \sf{ \bold{1.  \:  \: \: x = 5}}}</h3>

\boxed{ \sf{ \bold{2. \:  \: x = 6}}}

\boxed{ \bold{ \sf{3. \:  \: x = 21}}}

Step-by-step explanation:

1. \sf{3x + 6 = 21}

Move constant to right hand side and change its sign

⇒\sf{3x = 21 - 6}

Subtract 6 from 21

⇒\sf{3x = 15}

Divide both sides of the equation by 3

⇒\sf{ \frac{3x}{3}  =  \frac{15}{3} }

Calculate

⇒\sf{x = 5}

--------------------------------------------------------

2. \sf{33  = 7x - 9 }

Swap the sides of the equation

⇒\sf{7x - 9 = 33}

Move constant to right hand side and change it's sign

⇒\sf{7x = 33 + 9}

Add the numbers

⇒\sf{7x = 42}

Divide both sides of the equation by 7

⇒\sf{ \frac{7x}{7}  =  \frac{42}{7} }

Calculate

⇒\sf{x = 6}

---------------------------------------------------------

3. \sf{28 = 7 + x}

Swap the sides of the equation

⇒\sf{7 + x = 28}

Move constant to right hand side and change it's sign

⇒\sf{x = 28 - 7}

Subtract 7 from 28

⇒\sf{x = 21}

Hope I helped!

Best regards!!

7 0
3 years ago
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Ad libitum [116K]
It would be: -2/3 * -9/10 = 18/30 = 3/5

So, option B is your answer.

Hope this helps!
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3 years ago
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Answer:

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Step-by-step explanation:

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