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jarptica [38.1K]
4 years ago
10

George starts with a number. He takes away 7, then squares it, adds 6, subtracts 13, multiplies it by 4 and subtracts 1. 

Mathematics
1 answer:
il63 [147K]4 years ago
7 0

Answer:

10 or 4.

Step-by-step explanation:

[(x - 7)^2 + 6 - 13 ] * 4 - 1 = 7

(x^2 - 14x + 49 - 7) * 4 - 1 = 7

4x^2 - 56x  + 196 - 28  - 1 - 7 = 0

4x^2 - 56x + 160 = 0

4(x^2 - 14x + 40) = 0

(x - 10)(x - 4) = 0

x = 10 , 4

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Ninas garden is 4 1/3 meters long and 3/10 meters wide what is the area of ninas garden?
Liula [17]

Answer:

Nina's Garden has an area of 1.3 meters

Step-by-step explanation:

All we have to do is multiply.

4 1/3 * 3/10 = 1.3

So, the answer is 1.3

Hope this helps! :)

7 0
3 years ago
Oscar cuts grass for $20 a lawn. He is saving to purchase an Mp3 player that costs $249.99. He will also have to pay 6% saless t
Anna35 [415]
He would have to mow 14 lawns. To find the answer you would multiply 249.99 by 6%, then add the answer and round and you would get 264.99. 20 x 14 equals $280, so if he mowed 14 lawns and get $20 per lawn, he would buy the Mp3 and still have 15.01 leftover.

Hope this helps!
5 0
4 years ago
Read 2 more answers
Rationalise the denominator of: (√3 - √2)/(√3+√2) = ?​
marissa [1.9K]

Step-by-step explanation:

<h2><u>Given :-</u></h2>

(√3-√2)/(√3+√2)

<h2><u>To find :-</u></h2>

Rationalised form = ?

<h2><u>Solution:-</u></h2>

Given that

(√3-√2)/(√3+√2)

The denominator = √3+√2

The Rationalising factor of √3+√2 is √3-√2

On Rationalising the denominator then

=> [(√3-√2)/(√3+√2)]×[(√3-√2)/(√3-√2)]

=> [(√3-√2)(√3-√2)]×[(√3+√2)(√3-√2)]

=> (√3-√2)²/[(√3+√2)(√3-√2)]

=> (√3-√2)²/[(√3)²-(√2)²]

Since (a+b)(a-b) = a²-b²

Where , a = √3 and b = √2

=> (√3-√2)²/(3-2)

=> (√3-√2)²/1

=> (√3-√2)²

=> (√3)²-2(√3)(√2)+(√2)²

Since , (a-b)² = a²-2ab+b²

Where , a = √3 and b = √2

=> 3-2√6+2

=> 5-2√6

Hence, the denominator is rationalised.

<h2><u>Answer</u><u>:</u></h2>

Rationalised form of (√3-√2)/(√3+√2) is 5 - 2√6.

<h2><u>U</u><u>sed </u><u>formulae:</u><u>-</u></h2>
  • (a+b)(a-b) = a²-b²
  • (a-b)² = a²-2ab+b²
  • The Rationalising factor of √3+√2 is √3-√2
4 0
3 years ago
Brainiest to who answers
ZanzabumX [31]
The answer is in the picture

6 0
3 years ago
Read 2 more answers
Find the area of the parallelogram
Natali5045456 [20]
It’s going to be base x height so 10 x 3=30
You’re answer is 30 cm squared
4 0
3 years ago
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