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aivan3 [116]
3 years ago
12

Is the sum of 4.2 and 2 squared irrational or rational ?

Mathematics
2 answers:
RUDIKE [14]3 years ago
4 0
Rational because it would be 8.2
Effectus [21]3 years ago
3 0
4.2 is a rational number and the square root of 2 is a irrational number. The sum of a rational number is a irrational number is alwayd irrational.
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Find the inverse of the relation. Use proper notation. {(8,−1),(−8,−1),(−2,−8),(2,8)} please help!!
tiny-mole [99]

Answer: The inverse relation is { (-1, -8), (-1, -8), (-8, -2), (8, 2) }

The inverse is effectively the opposite of the original relation. It undoes what the original relation does. So we'll swap the x and y values for each given point in the form (x,y). Something like (8,-1) becomes (-1,8). The other points follow the same pattern as well.

6 0
3 years ago
A box has a base of 12 inches by 12 inches and a height of 30 inches. What is the length of the interior diagonal of the box? Ro
Wittaler [7]

The sides of the box are 12in by 12in by 30in.

The interior diagonal =[12^2+12^2+30^2]0.5

=[144+144+900]^0.5

=1188^0.5

The final answer is 34.47in.

My deepest apology if this is not what you meant.

= 34.47in.

3 0
3 years ago
A student ran out of time on a multiple choice exam and randomly guessed the answers for two problems. Each problem had 5 answer
choli [55]

Answer:

there is a 64% chance that the student got both problems wrong

a 32% chance that they got only 1 correct

and a 4% chance that they got both correct

Step-by-step explanation:

There are 25 total possible combinations of answers, with 8 possible combinations where the student would get 1 answer right, and 1 combination where the student would get both answers correct.

25-9=16

\frac{16}{25} =\frac{x}{100}

\frac{64}{100}

64%

\frac{8}{25} =\frac{y}{100}

\frac{32}{100}

32%

\frac{1}{25} =\frac{z}{100}

\frac{4}{100}

4%

3 0
3 years ago
.What is the<br> percent increase from 1987 to today?
kozerog [31]

Answer:

In other words, $100 in 1987 is equivalent in purchasing power to about $227.09 in 2020, a difference of $127.09 over 33 years. The 1987 inflation rate was 3.65%. The current inflation rate (2019 to 2020) is now 2.49% 

7 0
3 years ago
(4y 2 – 5y) + (3y – 7y 2) – (2y 2 + 6y – 5)<br> Simplify.
Elan Coil [88]
<span>Equation at the end of step  1  :</span><span><span> (((4•(y2))-5y)+(3y-(7•(y2))))-((2y2+6y)-5) </span><span> Step  2  :</span></span><span>Equation at the end of step  2  :</span><span><span> (((4•(y2))-5y)+(3y-7y2))-(2y2+6y-5) </span><span> Step  3  :</span></span><span>Equation at the end of step  3  :</span><span> ((22y2 - 5y) + (3y - 7y2)) - (2y2 + 6y - 5) </span><span> Step  4  :</span><span> Step  5  :</span>Pulling out like terms :

<span> 5.1 </span>    Pull out like factors :

  <span> -5y2 - 8y + 5</span>  =  <span> -1 • (5y2 + 8y - 5)</span> 



I hope tht help

4 0
3 years ago
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