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stiv31 [10]
4 years ago
13

Factorise the following expressions m²-9n²​

Mathematics
1 answer:
Mashcka [7]4 years ago
3 0

Answer:

(m - 3n)(m + 3n).

Step-by-step explanation:

This is the difference of 2 squares, so we use the identity:

a^2 - b^2 = (a - b)(a + b).

So m^2 - 9n^2

(m - 3n)(m + 3n).

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(10 POINTS AND BRAINLIEST FOR BEST)
Naddik [55]

Answer:

C. II only

Step-by-step explanation:

Basically all you need do is plug these answers in and if the complete the inequality to make a true statement.

Yes i know no body want to do that but that whats need to be done lol.

once i plug 7 12/7+8 = 12.83

12.83>20

is incorrect

so we need continue

7*2.5+8>20

7*2.5= 17.5

17.5+8= 25.5

25.5>20

this a true statement

so we know 2.5 is an answer

now we need plug in -3

7*-3= -21

-21 +8 = -13

-13>20

this is incorrect

6 0
4 years ago
Write the slope-intercept form of the equation of the line through the given points.
MatroZZZ [7]

Answer:

y = x-4

Step-by-step explanation:

First find the slope

m = ( y2-y1)/(x2-x1)

   = ( -3 -1)/( 1 - 5)

   = -4/-4

   = 1

Then using slope intercept form

y = mx+b where m is the slope and b is the y intercept

y = 1x+b

Substitute one of the points in

1 = 5 +b

1-5 = b

-4 =b

y = x-4

6 0
3 years ago
What is 150 in simplified radical form? A.75/3 B.25/6 C.5/6 D.5/2
Gemiola [76]
Your answer is b .25/6
4 0
3 years ago
How many roots (solutions) does the function below have?<br> f(x) = x3 - 6x2 + 3x + 10
STALIN [3.7K]

Answer:

76

Step-by-step explanation:

7 0
3 years ago
A bakery sold a total of 500 cupcakes in a day, and 5% of them were vanilla flavored. How many of the cupcakes sold that day wer
topjm [15]
25 were vanilla
500 divided by 100 is 5 meaning that one percent is 5 and 5x5 is 25
5 0
3 years ago
Read 2 more answers
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