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Rus_ich [418]
2 years ago
11

What is the highest fractions 2/4 5/6 3/2 1/9 4/5 8/2 ​

Mathematics
1 answer:
Akimi4 [234]2 years ago
6 0

Answer:

8/2

eight halves

Step-by-step explanation:

please mark this answer as brainliest

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A jeweler wants to make 14 grams of an alloy that is precisely 75% gold.. The jeweler has alloys that are 25% gold, 50% gold, &a
Goryan [66]

Given that the jeweler has alloys that are 25% gold, 50% gold, and 82% gold.

As he wants to make 14 grams of an alloy by adding two different alloys that is precisely 75% gold, so one alloy must have a percentage of gold more than 75%.

One alloy is 82% gold and, the second can be chosen between 25% gold, 50% gold, so there are two cases.

Case 1: 82% gold + 50% gold

Let x grams of 82% gold and y  grams of 50% gold added to make x+y=14 grams of 75% gold, so

75% of 14 = 82% of x + 50% of y

\Rightarrow 75/100 \times 14 = 82/100 \times x + 50/100 \times y \\\\

\Rightarrow 75/100 \times 14 = 82/100 \times x + 50/100 \times (14-x)  [as x+y=14]

\Rightarrow 75 \times 14 = 82 \times x + 50 \times (14-x)  \\\\\Rightarrow 75 \times 14 = 82 \times x + 50 \times14-50\times x \\\\\Rightarrow 75 \times 14 = 32 \times x + 50 \times14 \\\\\Rightarrow 32 \times x =75 \times 14 - 50 \times14 \\\\

\Rightarrow x =(25 \times 14)/32=10.9375 grams

and y = 14-x= 14-10.9375=3.0625 grams.

Hence, 10.9375 grams of 82% gold and 3.0625  grams of 50% gold added to make 14 grams of 75% gold.

Case 2: 82% gold + 25% gold

Let x grams of 82% gold and y  grams of 25% gold added to make x+y=14 grams of 75% gold, so

75% of 14 = 82% of x + 25% of y

\Rightarrow 75/100 \times 14 = 82/100 \times x + 25/100 \times y \\\\\Rightarrow 75/100 \times 14 = 82/100 \times x + 25/100 \times (14-x) \\\\ \Rightarrow 75 \times 14 = 82 \times x + 25 \times (14-x)  \\\\\Rightarrow 75 \times 14 = 82 \times x + 25 \times14-25\times x \\\\\Rightarrow 75 \times 14 = 57 \times x + 25 \times14 \\\\\Rightarrow 57 \times x =75 \times 14 - 25 \times14 \\\\

\Rightarrow x =(50 \times 14)/57=12.28 grams

and y = 14-x= 14-12.28=1.72 grams.

Hence, 12.28 grams of 82% gold and 1.72  grams of 50% gold added to make 14 grams of 75% gold.

3 0
2 years ago
After 3.5 hours pasha had traveled to 17 miles if she travels at a constant speed how far will she have traveled after four hour
laiz [17]
Since we want to know how far she goes every hour to multiply that by 4 to get how far she goes in 4 hours, we do 17/3.5 to get per hour miles = around 4.86. Multiply that by 4 to get around 19.43 miles
4 0
3 years ago
Someone please help me
dem82 [27]
Which problem? I will help you if you tell me what problem it is.
6 0
2 years ago
Work out the size of the angle
Fittoniya [83]

Answer:<CDA≈ 47.5 degrees

Step-by-step explanation:

I note M , so BM _|_ AD

in trg ABM, T Pitagora

AM^2=AB^2-BM^2

AM^2=6.5^2-6^2

AM^2=42.25-36

AM^2=6.25

AM=2.5

I note N , so CN_|_  AD

AD=AM+MN+ND

23=2.5+9+ND

23=11.5+ND

ND=23-11.5

ND=11.5

in trg CND

tg <CDA=CN/ND

=6/11.5

=1.(09)

so <CDA≈ 47.5 degrees

6 0
3 years ago
I need to know the answers
oee [108]
2) 849= 850
4) 27= 30
8) 93= 90
10) 861= 860
12) 16= 20
3 0
2 years ago
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