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belka [17]
3 years ago
12

If mn, solve for x. (3x + 9) (x + 21)

Mathematics
1 answer:
Sloan [31]3 years ago
6 0

2

3x. + 63x + 9x + 189

Step-by-step explanation:

<em>Use</em><em> </em><em>distributive</em><em> </em><em>law</em><em>,</em><em> </em><em>in</em><em> </em><em>other</em><em> </em><em>words</em><em> </em><em>multiply</em><em> </em><em>the</em><em> </em><em>first</em><em> </em><em>bracket</em><em> </em><em>terms</em><em> </em><em>by</em><em> </em><em>the</em><em> </em><em>second</em><em> </em><em>bracket</em><em> </em><em>terms</em><em> </em>

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What is the slope intercept form of the perpendicular line to the line with (-2,7), (0,1) and (2,-5) points
MAVERICK [17]

Answer:

Step-by-step explanation:

Slope of line through the three points is -3.

Slope of any perpendicular through the line is ⅓.

(0,1) is one of the points on the line, so the y-intercept is 1.

Slope-intercept equation for line of slope ⅓ and y-intercept 1:

y = ⅓x+1

6 0
3 years ago
-x + 5y = 13<br>x - y = 15​
aivan3 [116]

Answer:

x-y-15=15-15

x-y-15=0

hope this helps :)

3 0
3 years ago
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How to solve this one​
Stells [14]

Answer:

(-5,1)

Step-by-step explanation:

Add it together

3x - 2x = x

y - y = 0

9 - 14 = -5

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Choose a random equation, doesn't matter.

3x + y = -14

3(-5) + y = -14

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y = -14 + 15

y = 1

7 0
3 years ago
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Is 13/ 4 the same as 3 1/4 ? Explain your answer in complete sentences. ​
Andrew [12]

Answer:

no it is not the same.

Step-by-step explanation:

it is not the same because 13/4 is smaller than 3/14. 3 1/4 includes a whole number, and 13/4 doesn't.

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(-2+6i)(-5 + 3i) answer<br>​
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Answer:

-8 - 36i

Step-by-step explanation:

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3 years ago
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