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beks73 [17]
3 years ago
10

2r-7=-1. Help please thanks

Mathematics
1 answer:
UkoKoshka [18]3 years ago
6 0

Answer:

-3

Step-by-step explanation:

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a wire of length 200 cm is cut into two parts and each part is bent to form a square.If the area of the larger square is 9 times
diamong [38]

<em>Answer:</em>

<em>The perimeter of the larger square is 150cm.</em>

<em>Step-by-step explanation:</em>

<em>First of all, let one part of it be "x"</em>

<em>and the other part of it "200-x"</em>

<em>Now to solve this :</em>

<em>The area of the square = L^2</em>

<em>The area of one part of the square = x^2</em>

<em>The area of the other part of the square = (200-x)^2</em>

<em>9x^2= (200-x)^2\\9x^2=40000-400x+x^2</em>

<em></em>

<em>Now, add, -4x^2 to both the sides :</em>

<em>9x^2-9x^2=40000-400x+x^2-9x^2\\-1(8x^2+400x-40000)=0</em>

<em />

<em>Now, take out the "8" which is common :</em>

<em>-8(x^2+50x-5000)=0</em>

<em></em>

<em>Now, divide it by -8 :</em>

<em>x^2+100x-50x-5000=0\\x(x+100)-50(x+100)=0\\(x+100)(x-50)=0\\</em>

<em>x=-100 or 50</em>

<em />

<em>So, now we know that :</em>

<em>One of the part is = 50cm</em>

<em>And the other part is = 150cm</em>

<em />

<em>Thus the perimeter of the larger square is = 150cm</em>

3 0
3 years ago
Which expression, when simplified, is equal to 7p
Sphinxa [80]
Um I dont know the specific expression. But I think one of them would be 6p + 1p = 7p. I know its really simple but its kinda right. Hope I can help. Sorry If im wrong

6 0
3 years ago
Put a check by all the factors of 20. <br> 24,2,4,3,6,12,1,8
iren [92.7K]

24

2**

4**

3

6

12

1**

8

the ones i chose are correct

(1,20),(2,10),(4,5)

8 0
3 years ago
A man earned £6500 for the month. He paid 2/5 in tax . How much did he have left to spend?
grin007 [14]

Answer:

$2600

Step-by-step explanation:

Im not too fond of the conversion of Pounds and USD. But if it were USD 2/5 of the amount would be $2600

6 0
2 years ago
Zack used these steps to solve this equation: Three-fourths y + 5 = negative three-fourths y minus 9. Step 1: StartFraction 6 Ov
frez [133]

Answer:

C

Step-by-step explanation:

ur welcome

5 0
3 years ago
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