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lina2011 [118]
3 years ago
12

A bag contains 120 marbles. Some are red and the rest are black. There are 9 marbles for every black marble. How many red marble

s are in the bag?
Mathematics
1 answer:
inna [77]3 years ago
0 0

Answer:

There are 12 red marbles

9 black marbles = 108

9 black for 1 red= 12 red

108 black+ 12 red= 120

Step-by-step explanation:

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Solve one variable linear equation 7h-5(3h-8) = -72
pshichka [43]

Answer:

h =14

Step-by-step explanation:

4 0
3 years ago
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About 60,000 acres of wetlands are lost each year in the United states. What integer represents the change in wetlands after 4 y
QveST [7]

Over 4 years, there will be a loss of 60,000 acres per year, so 60,000 times 4 is equal to 240,000 acres. 240,000 is positive because the problem asks for the change, not the increase.

This is the work you will show


c=-60,000(4)

c=-240,000


So -240,000 represents the change.


You could also just count by -60,000 four times.


-60,000-60,000-60,000-60,000=-240,000.

4 0
3 years ago
A room is 20 feet long, 12 feet wide, and 10 feet high. What is the maximum distance from one corner to another
exis [7]

Answer:

25.38

Step-by-step explanation:

Its a 3-D block, so you have to find the distance from on corner to the opposite corner of the roof, but first find the distance from corner to corner on the floor.

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400+144=544=c^2

c=\sqrt{544}

then find corner of floor to opposite roof corner.

100+544=644=c^2

c=\sqrt{644}

so its about 25.38 feet

4 0
3 years ago
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Either enter an exact answer in terms of pi or use 3.14 for pi and round your final answer to the nearest hundredth.
SVETLANKA909090 [29]

Answer:

18.85 units 3

Step-by-step explanation:

7 0
3 years ago
What is the expression for "the difference between 5 times a number and twice that number"?
ycow [4]
Hey there :)

Before translating the sentence into mathematics, let r represent 'a number'

5 times a number = 5r
2 times that number = 2r

The difference between them = 5r - 2r 

* Your equation 
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* Solving the equation 
= 5r - 2r
= 3r
3 0
3 years ago
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