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victus00 [196]
3 years ago
6

Find the product of (3x + 7y)(3x − 7y)

Mathematics
2 answers:
snow_lady [41]3 years ago
8 0

Answer: 9x^2 - 49y^2

Step-by-step explanation:

(3x + 7y)(3x − 7y)

9x^2 -21xy + 21xy - 49y^2

9x^2 - 49y^2

nalin [4]3 years ago
7 0

Answer:

9x^2 - 49y^2

Step-by-step explanation:

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What is the answer (6-1+7) =
sdas [7]

Answer:

12

Step-by-step explanation:

You do what's in parentheses first, but everything is in parentheses so it's pretty much ineffective. In PEMDAS, addition and subtraction are coupled so you do them left to right. 6-1 is 5 and 5+7 is 12.

4 0
3 years ago
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The ratio of girls to boys is 2:3. There are 12 boys. How many<br> girls are there?
Marianna [84]

Answer:

18 girls

Step-by-step explanation:

2g = 3b

b = 12

g = girls

b = boys

2g = 3*12

2g = 36

g = 36/2

g = 18

5 0
2 years ago
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11 x minus 3 y = negative 17. Negative 4 x + 3 y = negative 18. Negative 7 x = negative 35 Negative 7 x = 35 7 x = negative 35 7
posledela

Answer:

7 x = -35

Step-by-step explanation:

Which equation results from adding the equations in this system? 11 x minus 3 y = -17. Negative 4 x + 3 y = - 18.

- 7 x = negative 35

- 7 x = 35

7 x = negative 35

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In this problem we need to add the equations below i.e.

11x-3y = -17 and -4x+3y=-18

Adding both equations,

11x-3y+(-4x)+3y = -17+(-18)

7x= -35

or

7 x = negative 35

Hence, the correct option is (c).

5 0
3 years ago
Where to put parentheses on 15/3+2•11
Ann [662]

Answer:

You should put the parentheses on the 12/3+2(11)

Hope this helps! :)

4 0
3 years ago
9decimals with 3 decimal places when rounded to the nearest hundredth round to 4.56.
suter [353]
? 123456.789 ?????

then round2(123456.789)

=123456.79
6 0
3 years ago
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