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soldi70 [24.7K]
3 years ago
9

What is the answer to 3/8 + 4/5 ?

Mathematics
2 answers:
REY [17]3 years ago
6 0

find the lcm first for 8 and 5 which is 40

closs multiply the 4 given numbers

so,

8x4 +5x3/ 40 (lcm)

32+15/40 = 47/40

47/40 = 1.175

ans = 1.175

hope that helps u out


Phantasy [73]3 years ago
6 0
\frac{3}{8}+ \frac{4}{5} \\ 
 \\  \frac{3*5}{8*5}= \frac{15}{40} \\ 
 \\  \frac{4*8}{5*8}= \frac{32}{40} \\  
 \\  \frac{15}{40}+ \frac{32}{40}= \frac{47}{40} \\ 
 \\  \frac{47}{40}=1 \frac{7}{40} \\ 
 \\ Answer:1 \frac{7}{40} \\
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Answer:

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Step-by-step explanation:

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Putting x=5 in equation 1

4(5)+6y = 32\\20+6y = 32\\6y = 32-20\\6y = 12\\\frac{6y}{6} = \frac{12}{6}\\y = 2

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The second set of simultaneous equations is:

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We can see that the coefficients of x in both equations are same in magnitude with opposite signs so

Adding both equations

-3x+5y+3x+7y = -11-1\\12y = -12\\\frac{12y}{12} = \frac{-12}{12}\\y = -1

Putting y= -1 in first equation

-3x+5(-1)=-11\\-3x-5=-11\\-3x=-11+5\\-3x=-6\\\frac{-3x}{-3} = \frac{-6}{-3}\\x = 2

The solution is: (2,-1)

Hence,

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<u>Can i please have brainliest, if not thats alright</u>

<u>Have a good day</u>

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