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sveticcg [70]
3 years ago
14

Which equation means four plus a number is equal to 10?

Mathematics
2 answers:
trasher [3.6K]3 years ago
8 0
The answer is C. lets say that we put the number is unknown f. so 4 + f = 10
ArbitrLikvidat [17]3 years ago
3 0
C 4 + f = 10
answer C
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7 times as much as the sum of 1/3 and 4/5
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First of all, you add 1/3 and 4/5, so you get:
\frac{1}{3} +  \frac{4}{5}

To add 2 fractions, they need to have the same denominator. Since 3 and 5 don't have a common factor, so you multiply 1/3 by 5, and 4/5 by 3, so you get:
\frac{1*5}{3*5} +  \frac{4*3}{5*3}
\frac{5}{15} +  \frac{12}{15}

Now, the two fractions got the same denominator, and you can add them by adding the numerators over the same denominator. (You don't add denominators in addition) so you get:
\frac{5+12}{15}
\frac{17}{15}

That's the sum of 1/3 + 4/5.

Now, they want the sum of the 2 fractions 7 times. So you multiply 17/15 by 7. And as you know, 7 = 7/1. So you get:
\frac{17}{15} *  \frac{7}{1}

In multiplication no need to have the same denominator. You multiply nominators by nominators and denominators by denominators. So you get:
\frac{17*7}{15*1}
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Since 119 and 15 don't have a common factor, so they can't be simplified.
So, the answer is 119/15. 

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3 years ago
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Helo asap !! will get branliest.​
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Nady [450]

Answer:

y = 3

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