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3 years ago

A student dissolves some solid sodium chloride in a beaker of water.

Mathematics

1 answer:

Margarita [4]3 years ago

3 0

Solute = what is dissolved

solvent = that which dissolves or can dissolve

You take it from here.

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Ron's factory is currently producing 30 chairs in a day. how many chairs will be produced if production is to be increased by 13

Anika [276]

Your answer is 39 chairs per day.

$\frac { 130 }{ 100 } \cdot 30\\ \\ =\frac { 3900 }{ 100 } \\ \\ =\frac { 39\cdot 100 }{ 100 } \\ \\ =39$

5 0

3 years ago

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Solve x2 - 8x - 9 = 0. Rewrite the equation so that it is of the form x2 + bx = c.

barxatty [35]

Answer:

x=9,-1 and $x^2+(-8)x=9$

Explanation:

we have been given with the quadratic equation $x^2-8x-9$

we compare the given quadratic equation with general quadratic equation

general quadratic is $ax^2+bx+c=0$

from given quadratic equation a=1,b= -8,c= -9

substituting these values in the formula for discriminant $D=b^{2}-4ac$

$D=(-8)^2-4(1)(-9)=100$

Now, to find the value of x

Formula is $x=\frac{-b\pm\sqrt{D}}{2a}$

Now, substituting the values we will get

$x=\frac{-(-8)\pm\sqrt{100}} {2}= \frac{8\pm10}{2}=9,-1$

And rewritting the given equation by shifting 9 to right hand side of the given equation and taking minus inside the bracket so as to convert it in the form of

$x^2+bx=c$

4 0

3 years ago

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What is the LCM for 9 and 12

Serhud [2]

36! goodluck hope it good

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2 years ago

Do you guys ever just sit there and realize how not ok you are?

ludmilkaskok [199]

Are you ok? do you want to talk about it babe?

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2 years ago

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Which of the following are like terms to the term 2x (which more than one apply?

GuDViN [60]

-2x and 4x
and x2 so tats it

6 0

3 years ago