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olya-2409 [2.1K]

3 years ago

8

What is the square root of 9

1 answer:

Troyanec [42]3 years ago

4 0

The square root of 9 is 3

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(2x+1)(2x-1) find the product

VladimirAG [237]

Difference of 2 perfect squares
a^2-b^2=(a-b)(a+b)
recognize that

(2x+1)(2x-1)
(a+b)(a-b)
therefor
product is
(2x)^2-(1)^2=
4x^2-1

8 0

3 years ago

Please solve both questions in exact form (no decimals) with explanation of how you solved it. Answer quick, will mark as Brainl

Soloha48 [4]

Answer:

21

Step-by-step explanation:

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3 years ago

What is the result when 8x + 3 is subtracted from -2x + 5?

Lerok [7]

First you must find x in order to solve this question, unless you do not need to find out X.

6 0

3 years ago

Christopher swam laps everyday in the town swimming pool. He swam 45 minutes each day, 5 days each week, for 12 weeks.

Dahasolnce [82]

45(5)=225 than multiply that by 60 because remember he only swam 5 out of 7 days a week (12x5=60) therefore 225x60= 13,500 minutes to convert to hours divide by 60 which will be 225 hours

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3 years ago

MUST BE CORRECT ANSWER HELP ASAP

Nina [5.8K]

Answer:

40287600 = B. 4 x $10^{7}$

Step-by-step explanation:

<u>We first have to do the multiplication of the numbers given:</u>

19 * 2,120,400

=> 40287600

<u>Now we have to figure out how many digits are after the number 4:</u>

4, 0 2 8 7 6 0 0

7 digits

Meaning that we need an exponent of 7 for it to be in scientific notation, giving us with the answer B. 4 x $10^{7}$

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3 years ago