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3 years ago

A equivalent expression to 9x-7y-6x

Mathematics

2 answers:

daser333 [38]3 years ago

8 0

Answer:

$3x - 7y$

Step-by-step explanation:

<u>Step 1: Combine like terms</u>

<u /> $9x - 7y - 6x$

$(9x - 6x) - 7y$

$3x - 7y$

Answer: $3x - 7y$

matrenka [14]3 years ago

5 0

Answer:

3x-7y

Step-by-step explanation:

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Carl can paint a room 3 hours faster than Jennifer can

Nata [24]

Jen take x hours.
Carl (x-3)hours.
Jen+carl take two hours;
This means;
In 1 hour, for they work
$\frac{1}{x} + \frac{1}{x-3}$
= $\frac{(x-3)+x}{x(x-3)}$
= $\frac{2x-3}{x(x-3)}$
Working together, they take two hours;
Take reciprocal of above equation and equate to two;
= $\frac{x(x-3)}{2x-3} =2$
$x^{2}$ -3x=4x-6
$x^{2} -7x+6=0$
$x^{2}$ -x-6x+6=0
x(x-1)-6(x-1)=0
(x-6)(x-1)=0
Take the bracket x-6=0 so that Carl works positive hours
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8 0

3 years ago

What is 1/4 divided by -1/2?

Sergio039 [100]

Answer:

1/2

Step-by-step explanation:

KEEP 1/4 CHANGE the sign to multiplication FLIP 1/2 to 2/1

new equation: 1/4 x 2/1

now we can solve

we do: 1 x 2= 2

so 2 is our nominator

then we do: 4 x 1= 4

so 4 is our denominator

combine the nominator and denominator and we get

1/2 which in decimal form is 0.5

3 0

3 years ago

Find a power series representation for the function. (give your power series representation centered at x = 0. ) f(x) = ln(5 − x

klio [65]

Recall that for $|x|$ , we have the convergent geometric series

$\displaystyle \sum_{n=0}^\infty x^n = \frac1{1-x}$

Now, for $\left|\frac x5\right| < 1$ , we have

$\dfrac1{5 - x} = \dfrac15 \cdot \dfrac1{1 - \frac x5} = \dfrac15 \displaystyle \sum_{n=0}^\infty \left(\frac x5\right)^n = \sum_{n=0}^\infty \frac{x^n}{5^{n+1}}$