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3 years ago

What ius the symoble for iron

Mathematics

1 answer:

Diano4ka-milaya [45]3 years ago

8 0

Answer:

Step-by-step explanation:

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Solve -3 1/2 = 1/2x + 1/2x + x

Verizon [17]

Answer:

-1.75 I apologize if that is not right but i am 99% sure

Step-by-step explanation:

When you add like terms on the right side you end up with 2x, then all you di is divide both sides by 2 and you end up with -1.75

5 0

4 years ago

A boy's age in ten year time will be four times his age five years ago. Find his present age.

Katyanochek1 [597]

Answer:

He is ten.

Step-by-step explanation:

10 yrs old. Go ahead 10 yrs to make 20. Which is four times as much as five years old. (Which is 5 years before 10)

Hope this helps! :)

8 0

3 years ago

Tamara feeds her cat 1/8cup canned food each day and the

zloy xaker [14]

Answer:

1 week=7 days

1/8- canned

rest- dry = 8/8-1/8= 7/8 (1 day)

1 treat (one day)

to find dry food, multiply 7/8 by 7

dry food in a day = 7/8 = 0.875 cup

0.875*7= 6.125 cups a week = 6 and 1/8 cups a week

5 0

3 years ago

Differentiate x^2 e^x logx

zimovet [89]

Product rule:

$\dfrac{\mathrm d}{\mathrm dx}(x^2e^x\log x)$

$=\dfrac{\mathrm d(x^2)}{\mathrm dx}e^x\log x+x^2\dfrac{\mathrm d(e^x)}{\mathrm dx}\log x+x^2e^x\dfrac{\mathrm d(\log x)}{\mathrm dx}$

Power rule:

$\dfrac{\mathrm d(x^2)}{\mathrm dx}=2x$

The exponential function is its own derivative:

$\dfrac{\mathrm d(e^x)}{\mathrm dx}=e^x$

Assuming the base of $\log x$ is $e$ , its derivative is

$\dfrac{\mathrm d(\log x)}{\mathrm dx}=\dfrac1x$

But if you mean a logarithm of arbitrary base $b$ , we have

$y=\log_bx\implies x=b^y=e^{y\ln b}\implies1=e^{y\ln b}\ln b\dfrac{\mathrm dy}{\mathrm dx}$

$\implies\dfrac{\mathrm dy}{\mathrm dx}=\dfrac{e^{-y\ln b}}{\ln b}=\dfrac1{b^y\ln b}$

$\implies\dfrac{\mathrm d(\log_bx)}{\mathrm dx}=\dfrac1{x\ln b}$

So we end up with

$2xe^x\log x+x^2e^x\log x+\dfrac{x^2e^x}x$

$=xe^x(2\log x+x\log x+1)$

8 0

3 years ago

A triangle has side legnths of 11cm and 9cm.Which could be the value of the third side

lana66690 [7]

You didn't put any answer choices, but the formula for the sides of a triangle is that the two smaller sides have to add up to be GREATER the hypotenuse (the longest side). 11 + 9 = 20, so the value of the third side can be 21 or more.

Hope this helps!

3 0

3 years ago

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