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3 years ago

Dough says that the opposite of -2/5 is 5/-2 is he correct

Mathematics

2 answers:

Eduardwww [97]3 years ago

7 0

Answer:

No he is not correct. As the answer would be -2/5 = -0.4 and 5/-2 = -2.5 as the answer is also not opposite.

leva [86]3 years ago

6 0

Answer:Dough is correct

Step-by-step explanation:

The opposite or inverse of-2/5 is 1/(-2/5)=1 ➗ -2/5=1 x 5/-2=5/-2

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Determine the values of the constants b and c so that the function given below is differentiable. f(x)={2xbx2+cxx≤1x>1

Lera25 [3.4K]

Assuming the function is

$f(x)=\begin{cases}2x&\text{for }x\le1\\bx^2+cx&\text{for }x>1\end{cases}$

For $f(x)$ to be differentiable, it necessarily has to be continuous. For this condition to be met, we need

$\displaystyle\lim_{x\to1^-}f(x)=\lim_{x\to1^+}f(x)=f(1)$
$\iff\displaystyle\lim_{x\to1}2x=\lim_{x\to1}(bx^2+cx)$
$\iff2=b+c$

For the derivative to exist, the one-sided limits of the derivative must also exist and be equal. We have

$f'(x)=\begin{cases}2&\text{for }x1\end{cases}$

$\displaystyle\lim_{x\to1^-}2=\lim_{x\to1^+}(2bx+c)$
$\iff2=2b+c$

Now we solve for $b$ and $c$ :

$\begin{cases}b+c=2\\2b+c=2\end{cases}\implies b=0,c=2$

5 0

3 years ago

Simplify<br> (3/2x+5) + (5/x-5)

tia_tia [17]

Answer:

(3x + 10) / (2x + 5)(x - 5).

Step-by-step explanation:

(3/2x+5) + (5/x-5)

= [3(x - 5) + 5(2x + 5) ] / [ (2x + 5)(x - 5)]

= 3x - 15 + 10x + 25 / (2x + 5)(x - 5)

= 13x + 10 / (2x + 5)(x - 5).

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3 years ago

Work out the value of angle x 24 degrees

stich3 [128]

Answer:

180=2x+ 24( angles opposite to equal sides)

156/2=x

x=78

Step-by-step explanation:

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2 years ago

Read 2 more answers

Pls, help me pls pls pls

rjkz [21]

Answer:

14.4

Step-by-step explanation:

you can do 12*1.2= 14.4

becuase they didnt say equal to or less than 24 and they also didnt say equal to or greater than 12 hope this helps

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2 years ago

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klasskru [66]

I know a would be 40ft for Rachael and 50ft for Clare but I’m not completely sure about b

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