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murzikaleks [220]
4 years ago
14

Do all ratios compare a part to a whole ?

Mathematics
1 answer:
anyanavicka [17]4 years ago
6 0
Nope!

Let's say there are 14 boys and 15 girls in a math class. We can use the ratio 14:15 to find out how many boys and girls would be in a class triple the size.

There are many more ways to write a ratio than part to whole. I hope I helped! :)
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What is the solution to X and Y in these equations 3x + 9y=60 and -3x + y=30
Roman55 [17]

Answer:

x= -7 y=9

Step-by-step explanation:

3x +9y= 60 [1]

-3x +y=30 [2] rewrite this as the following:  y=30+3x

With equation [2] you substitute it into equation [1]

so it will now be: 3x+ 9(30 +3x) =60

3x+270 +27x=60

Group the like terms

3x+27x=60-270

30x=-210

x=-7

Use this answer into the same equation

So: 3(-7)+9y=60

-21 +9y=60

9y=60+21

9y=81

y=9

8 0
4 years ago
Simplify 5a+3a ???????
luda_lava [24]

Answer:

8a

Step-by-step explanation:

group all similar terms

3a + 5a = 8a

6 0
4 years ago
A. 81. B. 27 C. 108 D. 135
Zanzabum

Answer:

D 135

hope this helps

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8 0
3 years ago
Read 2 more answers
A train is moving at a rate of 65 miles/hour toward a railroad marker located 200 miles away. Which equation could be used to fi
yulyashka [42]

Answer:

h = 196/65

Step-by-step explanation:

65 miles /1 hour is the moving rate

200 miles is the distance to the railroad maker

h = ?

200- 4 miles = 196 miles were left behind the train

65miles /1 hour , 130miles/2hours , ..196miles/ ?hours

h = 196/65 = 3 hours and 1/65 minutes from an hour = 3 hours and 12/13 min.

60/ 65 = 12/13

5 0
2 years ago
What is 0.5% as a decimal and as a mixed number or fraction in simplest form
s344n2d4d5 [400]

Answer:

this should help

Step-by-step explanation:

percent=5%

decimal=.05

fraction=1/20

8 0
3 years ago
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