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kvv77 [185]
3 years ago
9

X = 2 - y3x - 10 = yi have to find yplease help

Mathematics
1 answer:
drek231 [11]3 years ago
3 0
I think the first one is 2y and the secound is,
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3) The half of (√200 + √128 ) is
Sliva [168]

Answer:

Option 2 i.e. 9√2 is the correct option.

Step-by-step explanation:

Given the expression

(\sqrt{200}\:+\:\sqrt{128})

The half of (\sqrt{200}\:+\:\sqrt{128}) can be determined by dividing the expression in half.

Therefore, we need to solve the expression such as

\frac{\left(\sqrt{200}\:+\:\sqrt{128}\:\right)}{2}

as

\sqrt{200}=\sqrt{100\times 2}=\sqrt{100^2\times \:2}=10\sqrt{2}

\sqrt{128}=\sqrt{64\times 2}=\sqrt{8^2\times \:2}=8\sqrt{2}

so the expression becomes

\frac{\left(\sqrt{200}\:+\:\sqrt{128}\:\right)}{2}=\frac{10\sqrt{2}+8\sqrt{2}}{2}

Add similar elements:  10\sqrt{2}+8\sqrt{2}=18\sqrt{2}

                     =\frac{18\sqrt{2}}{2}

Divide the numbers: 18/2 = 9

                      =9\sqrt{2}

Therefore, we conclude that:

\frac{\left(\sqrt{200}\:+\:\sqrt{128}\:\right)}{2}=9\sqrt{2}

Hence, option 2 i.e. 9√2 is the correct option.

4 0
3 years ago
Boating: A paddleboat moves at a rate of 12 mph in still water. If the rover’s current moves at a rate of 3 mph, how long will i
Lostsunrise [7]

The time taken by the boat to travel 32 miles downstream is 2.1 hours and for upstream 3.56 hours.

<h3>What is speed?</h3>

Speed is defined as the ratio of the time distance traveled by the body to the time taken by the body to cover the distance.

Given that:-

  • A paddleboat moves at a rate of 12 mph in still water. If the rover’s current moves at a rate of 3 mph.
  • how long will it take the boat to travel 36 miles downstream and 36 miles upstream?

The time taken by the boat upstream will be calculated as:-

( B + W ) Td = D

( 12 + 3 ) Td = 32

( 15 ) Td = 32

Td = 32 / 15 = 2.1 hours

The time taken by the boat downstream will be calculated as:-

( B - W ) Tu = D

( 12 - 3 ) Tu = 32

9 Tu = 32

Tu = 32 / 9 = 3.56 hours.

Therefore the time taken by the boat to travel 32 miles downstream is 2.1 hours and for upstream 3.56 hours.

To know more about Speed follow

brainly.com/question/6504879

#SPJ1

4 0
2 years ago
The area of a playground is 336 yd2. The width of the playground is 5 yd longer than its length. Find the length and width of th
kondaur [170]
L=16
W=21

Set up a systems of equations: 
x=length 
y=width 

xy=336
x+5=y

Use substitution to solve: 
x(x+5)=336
x^2+5x=336 

Solve using factoring: 
x^2+5x-336=0
(x-16)(x+21)=0
x=16 and x= -21 
Since length can't be negative, l=16 

To find width, plug length into the first equation: 
(16)y=336
y=21 

So...
L=16
<span>W=21</span>
7 0
3 years ago
Read 2 more answers
PLEASE HURRY
Aleksandr [31]

Answer:

There appears to have been a quick rise in sales that then leveled off and then began to rise once more. After the last rise in sales the sales decreased

Step-by-step explanation:

4 0
3 years ago
Help please!! asap!!
Llana [10]

Answer: 1. 2 2. 4 3. 9

Step-by-step explanation: Hi there!

First, we need to set up our equation by combining like terms.

x+2x+4x+1=15

7x+1=15

Then subtract 1 on both sides

7x=14

Then divide by 7

x=2

So x=2

Put that into all of the x values on the piece of steel to get 2, 4, 9.

Hope this answer helps you!

3 0
3 years ago
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