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3 years ago

Solve the equation for x. 4y - x = 6

Mathematics

1 answer:

ss7ja [257]3 years ago

8 0

Answer:

x=4y-6

Step-by-step explanation:

4y - x = 6

x=4y-6

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How would you graph x > 0 on a number line?

Anton [14]

Answer:

Step-by-step explanation:

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3 years ago

How many 1/6 are in 21/2

GrogVix [38]

63.

Explanation:

1/6 x 63 = 21/2

5 0

2 years ago

Read 2 more answers

For which values of x is the expression undefined? x+1/x-6

Morgarella [4.7K]

Answer:

x=6

Step-by-step explanation:

x+1

-------

x-6

The expression is undefined when the denominator is zero

x-6 =0

Solving for x

x+6-6 =0+6

x=6

4 0

2 years ago

Factor -7x^3+21x^2+3x-9 by grouping. what is the resulting expression?

Daniel [21]

Answer:

c) (3-7x^2)(x-3)

Step-by-step explanation:

-7x^3+21x^2+3x-9

Factor out a -7x^2 from the first two terms and a 3 from the last two terms

-7x^2 (x -3) +3(x-3)

Now factor out (x-3)

(x-3) (-7x^2+3)

Rearranging)

(x-3) (3-7x^2)

8 0

3 years ago

The area of a circular sun spot is growing at a rate of 1,200 km2/s.

Tpy6a [65]

A)

$\bf \textit{area of a circle}\\\\
A=\pi r^2
\\\\\\
\cfrac{dA}{dt}=\pi \cdot 2r\cfrac{dr}{dt}\implies \cfrac{dA}{dt}=2\pi r\cfrac{dr}{dt}\implies \cfrac{\frac{dA}{dt}}{2\pi r}=\cfrac{dr}{dt}\\\\
-----------------------------\\\\
\left. \cfrac{dr}{dt} \right|_{r=3000}\implies \cfrac{1200}{2\pi \cdot 3000}=\cfrac{dr}{dt}\\\\$

B)

$\bf A=\pi r^2\qquad A=490000\implies 490000=\pi r^2\implies \sqrt{\cfrac{490000}{\pi }}=r
\\\\\\
\left. \cfrac{dr}{dt} \right|_{r=\sqrt{\frac{490000}{\pi }}}\implies \cfrac{1200}{2\pi \cdot \sqrt{\frac{490000}{\pi }}}=\cfrac{dr}{dt}
$

8 0

2 years ago