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dangina [55]
3 years ago
15

emergency Alejandro has gone to school 5 Over 7 of the last 35 days. Which expression can be used to determine the number of day

s Alejandro has gone to school?
Mathematics
2 answers:
Yakvenalex [24]3 years ago
8 0

Answer:

245 days.

Step-by-step explanation:

Hope this helps.

Oksi-84 [34.3K]3 years ago
6 0
The answer is 245 days i’m pretty sure
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A metalworker has a metal alloy that is 15​% copper and another alloy that is 75​% copper. How many kilograms of each alloy shou
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48 kilograms of 15 % copper is combined with 72 kilograms of 75 % copper to create 120 kg of a 51​% copper​ alloy

<em><u>Solution:</u></em>

Let "x" be the kilograms of 15 % copper

Then, (120 - x) be the kilograms of 75 % copper

Then, according to question,

"x" kilograms of 15 % copper is combined with (120 - x) kilograms of 75 % copper to create 120 kg of a 51​% copper​ alloy

Thus we frame a equation as:

15 % of x + 75 % of (120 - x) = 51 % of 120

<em><u>Solve the equation for "x"</u></em>

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