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guapka [62]
3 years ago
15

12. Simplify –3√ 2 + 3√ 8 . A. 3√ 2 B. –3√ 2 C. 0 D. 9√ 2

Mathematics
2 answers:
scZoUnD [109]3 years ago
3 0
Your answer would be, A. <span>3√ 2. Hope I helped you :)</span>
Sergio [31]3 years ago
3 0
The answer is:  [A]:  3√ 2  .
______________________________
Explanation:
______________________________
 Simply:  -3√ <span>2  +  3√ 8 ;
_______________________________

Let us simplify:  3</span>√ 8 ;
<span>________________________________________________
Let us simplify: 
________________________________________________
</span>√ 8  ;   →  √ 8  =  √ 4 * √ 2  =  2√ 2 ;
<span>________________________________________________
</span> 
   →  √ 8  =  √ 4 * √ 2  = 2√ 2 ;
<span>__________________________________

  </span>→   3√ 8  =  3 * 2√ 2  = 6√ 2 ;
<span>____________________________________________________
So, rewrite the original problem, substituting:  "6</span>√ 2"  for "3√ 8" ;<span>
____________________________________________________

</span><span>       -3√ 2   +   3√ 8  =  
____________________________________________________

           -</span>3√ 2  +  6√ 2  =  3√ 2 ; which is Answer choice: [A].
____________________________________________________
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Anarel [89]
Answer: You start to ascend

Explanation:

Since you are walking due south and the positive y-axis points north, the y-coordinate decreases.

Let 

y' = y-coordinate after walking due south
z' = z-coordinate (or the height) after walking due south

So, the point where you stand after walking due south has a coordinate of (100, y', z'). Moreover,

z' = 1,400 - 0.05(100)^2 - 0.01(y')^2&#10;\\ \boxed{z' = 1350 - 0.01(y')^2}

Since the y-coordinate decreases after walking due south and z' = 1350 - 0.01(y')^2,

y'  \leq 120\\ \Rightarrow (y')^2 \leq 120^2 = 14,400\\ \Rightarrow -0.01(y')^2 \geq -0.01(14,400) = -144\\ \Rightarrow z' = 1,350 - 0.01(y')^2 \geq 1,350 - 0.01(14,400) = 1,206\\ \Rightarrow \boxed{z' \geq 1,206}

So, the height after walking due south exceeds 1,206 meters, which is the previous height before walking due south. Therefore, if you walk due south from point with coordinates (100, 120, 1206), you are ascending.
5 0
3 years ago
URGENT!!!!!
Anna11 [10]

h=20w

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h=20w works because if it has been two weeks we substitute the w with the number 2 and can solve

h=20(2)

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7 0
3 years ago
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Step-by-step explanation:

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Determine whether each relation is a function. Give the domain and range for each relation.
brilliants [131]

Answer:

Not a function

Domain: {3,4}

Range: {4,5}

Step-by-step explanation:

A function is a relation where each input has its own output. In other words if the x value has multiple corresponding y values then the relation is not a function

For the relation given {(3, 4), (3, 5), (4, 4), (4, 5)} the x value 3 and 4 have more than one corresponding y value therefore the relation shown is not a function

Now let's find the domain and range.

Domain is the set of x values in a relation.

The x values of the given relation are 3 and 4 so the domain is {3,4}

The range is the set of y values in a relation

The y value of the given relation include 4 and 5

So the range would be {4,5}

Notes:

The values of x and y should be written from least to greatest when writing them out as domain and range.

They should be written inside of brackets

Do not repeat numbers when writing the domain and range

3 0
3 years ago
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