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lesantik [10]
3 years ago
14

A bag contains white marbles and red marbles, 20 in total. The number of white marbles is 5 more than 2 times the number of red

marbles. How many white marbles are there?
Mathematics
1 answer:
Nitella [24]3 years ago
7 0

Answer:

15

Step-by-step explanation:

let r represent red marbles then white = 2r + 5 and total is 20, thus

r + 2r + 5 = 20 ( subtract 5 from both sides )

3r = 15 ( divide both sides by 3 )

r = 5 ← number of red marbles

Thus number of white = 20 - 5 = 15

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Two cities have nearly the same​ north-south line of 117 degrees Upper W. The latitude of the first city is 29 degrees Upper N c
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1117 km

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5 0
3 years ago
A right angled triangle has two shorter sides and one is twice as long as the other. The hypotenuse is 25cm long. What are the l
Bas_tet [7]

Answer:  x =  14.43

Step-by-step explanation:

The Pythagorean Theorem states the following:  

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Make the second side of the triangle 2x  

Now, you can plug the values into the equation,  right?  

x^2 + 2x^2 = 25^2 or 625  

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Divide each side by 3 and you are left with:  

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5 0
3 years ago
Read 2 more answers
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