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3 years ago

What doexs this equal: 3ab-9ab+7ab

Mathematics

2 answers:

AfilCa [17]3 years ago

8 0

Answer:

I think that it equals 1ab. Because 3ab - 9ab= -6ab + 7ab= 1ab

jasenka [17]3 years ago

7 0

So, this question tests wether or not you know how to combing "like terms".

Like terms are terms (thing inbetween +or-) that have the same variables.

Since all three terms contain "ab" we can add and subtract them.

So, 3ab-9ab = -6ab

-6ab+7ab=1ab

1ab is the correct answers

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What is the difference? startfraction 2 x 5 over x squared minus 3 x endfraction minus startfraction 3 x 5 over x cubed minus 9

weeeeeb [17]

The difference of the expression $\frac{2x^5}{x^2 - 3x} - \frac{3x^5}{x^3 - 9x}$ is $\frac{2x^5(x + 3) - 3x^5}{x(x - 3)(x + 3)}$

<h3>How to determine the difference?</h3>

The expression is given as:

$\frac{2x^5}{x^2 - 3x} - \frac{3x^5}{x^3 - 9x}$

Factor the denominators of the expressions:

$\frac{2x^5}{x(x - 3)} - \frac{3x^5}{x(x^2 - 9)}$

Apply the difference of two squares to x² - 9

$\frac{2x^5}{x(x - 3)} - \frac{3x^5}{x(x - 3)(x + 3)}$

Take LCM

$\frac{2x^5(x + 3) - 3x^5}{x(x - 3)(x + 3)}$

Hence, the difference of the expression $\frac{2x^5}{x^2 - 3x} - \frac{3x^5}{x^3 - 9x}$ is $\frac{2x^5(x + 3) - 3x^5}{x(x - 3)(x + 3)}$

Read more about expressions at:

brainly.com/question/723406

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6 0

2 years ago

ANSWER BOTH thanksss

NNADVOKAT [17]

Answer:

x=-400

x=-95

Step-by-step explanation:

They are negative because a negative times a negative is a positive.

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3 years ago

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Find the next two terms in this sequence, 16, 8, 4, 2, 1

sweet-ann [11.9K]

Answer:

$\frac{1}{2}$ and $\frac{1}{4}$

Step-by-step explanation:

The pattern is that a term gets divided by 2 to find the next term. 1 divided by 2 is $\frac{1}{2}$ and when you divide that by 2 you get $\frac{1}{4}$

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3 years ago

Solve the following for y: 9x − 3y = 18 (5 points) y = 3x + 6 y = 3x − 6 y = −3x − 6 y = −3x + 6

choli [55]

Answer:

y = 3x - 6

Step-by-step explanation:

given 9x - 3y = 18

isolate - 3y by subtracting 9x from both sides of the equation

- 3y = 18 - 9x ( divide all terms by - 3 )

y = $\frac{18}{-3}$ - $\frac{9x}{-3}$

= - 6 + 3x = 3x - 6

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3 years ago

If y= -2x-1 and x= -2 what is the answer?

Ronch [10]

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3 years ago

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