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algol13
3 years ago
5

Ralph is 3 times as old as Sara. In 4 years, Ralph will be only twice as old as Sara will be then. Find Ralph's age now.

Mathematics
2 answers:
Bad White [126]3 years ago
8 0
Let age of sarah is x then ralph is 3x
after 4 years sarah age is x+4 and ralph age is 3x+4
acc to stat 3x+4=2(x+4)
3x-2x=8-4
x=4
sarah age is 4 years and ralph age is 12 years
fiasKO [112]3 years ago
4 0
Ralph is 12. If Ralph is 12 that means Sara is 4 (12/4=3). In 4 years Sara will be 8 and Ralph would be 16 (16/8=2).
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o (16, 8, 12)

Step-by-step explanation:

1st number: 8*2 =16

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3rd number: given

7 0
3 years ago
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Can someone please answer this question please answer it correctly and please show work please help me I need it
vaieri [72.5K]

Answer:

A

Step-by-step explanation:

Lets find the values:

<em>Gained</em><em> </em>2.2 kg = 2.2

<em>Lost</em><em> </em>1.5 kg = (-1.5)

<em>Lost</em><em> </em>3.7 kg = (-3.7)

Adding these would be represented by the equation:

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3 0
3 years ago
Help please.....<br><br> What degree is angle BDA?<br> What degree is angle BCA?
Paladinen [302]
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6 0
3 years ago
Two important ingredients for baking bread are yeast and flour. To make a loaf of bread of at most 30 servings, maintain a yeast
IceJOKER [234]

Answer:

If 0.25 oz of yeast is used, then 50oz of flour is needed.

It would require 0.5 oz of yeast for 90 oz the flour.

Step-by-step explanation:

We know that the proportion of yeast (y) and flour (f) is 1: 200 when a maximum of 30 servings of bread is made. This is:

\frac{y}{f} = \frac{1}{200}

So if we use 0.25 oz of yeast:

y = 0.25\\\\y = (f)\frac{1}{200}\\\\0.25 = (f)\frac{1}{200}\\\\0.25 * 200 = f\\\\f = 50\ oz

if 0.25 oz of yeast is used, then 50oz of flour is needed.

If you make 60 servings of bread with 90 oz. Of flour, then you should keep the following ratio:

\frac{y}{f} =\frac{1}{180}

So, if we use f = 90 0z of flour:

f = 90\ oz\\\\f = 180y\\\\90 = 180y\\\\y = \frac{90}{180}\\\\y = 0.5\ oz

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4 0
3 years ago
The total number of books in the library is 1155.there are 20 times more nonfiction books than fiction books. How many fiction b
alekssr [168]
There is 20x more nonfiction than fiction so you do
20+1=21
so then to find out what \frac{1}{21} of 1155 is we do
1155÷21=55
so then we times 55 by 20 because there are 20x more nonfiction than fiction
55x20=1100
soo now we know there is
1100 nonfiction books and
55 fiction books
to check whether we are right we can do
1100=55=1155
we are right because there is 1155 books in the library
hope i helped
3 0
3 years ago
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