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ryzh [129]
2 years ago
7

2H20 1) How many hydrogen atoms are represented by this much water? A) 1 B) 2 0.4 D) 6​

Mathematics
1 answer:
Dahasolnce [82]2 years ago
5 0
Answer is B)2
2 hydrogen atom in the water molecule
H2O
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Find x, if 3x − 5(y + x ) ^2 = 16 and 4x + 2(y + x )^ 2 = 30
lana66690 [7]

Answer:

x = 7

Step-by-step explanation:

Start by solving for (y+x)^2 which is a common expression for both equations. Then in the first equation:

3\,x5\,(y+x)^2=16\\3x-16=5\,(y+x)^2\\(y+x)^2=\frac{3\,x-16}{5}

and in the second equation:

4\,x+2\,(y+x)^2=30\\2\,(y+x)^2=30-4\,x\\(y+x)^2=15-2\,x

Now we make the two (y+x)^2 expressions equal so we get:

\frac{3\,x-16}{5} =15-2\,x\\3\,x-16=75-10\,x\\13\,x=75+16\\13\,x=91\\x=7

8 0
3 years ago
The area of a rectangle is 44 m²<br> The width is 3 2/3m<br> Work out the missing length?
Alika [10]

Answer:

12 meter

Step-by-step explanation:

We know that ,

Area of rectangle = length × breadth

so,44m square = l × 3 2/3 m

or, 44m2 = length × 11/3

or ,( 44m2)/3 2/3m = length

finally, length = 12 meters

3 0
2 years ago
I need help ASAP! <br><br>Ques: In Attachment!<br>​
leva [86]

ANSWER:

◻ Rational no. —: Addition & Multiplication (Yes) and Subtraction & Division (No)

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3 years ago
Jenna is having her birthday party at the ice cream palace. The ice cream party palace charges 2.49 for each ice cream cone
valentina_108 [34]

Answer:

No answer

Step-by-step explanation:

You seemed to have not pisted the whole question. if you need to find the cost of a certain number of cones, use this equation.

Y=2.49x

Let Y equal the total cost

Let x equal the number of cones

7 0
3 years ago
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A washer and dryer cost $750 combined. The cost of the washer is two times the cost of the dryer. What is the cost of the dryer?
krok68 [10]
Washer=500
dryer=250
8 0
2 years ago
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