What is 1/5 plus 1/4 Plz help!

Mathematics

2 answers:

Masteriza [31]3 years ago

4 0

1/5 + 1/4.....lowest common denominator is 20
4/20 + 5/20 = 9/20 <==

elena-s [515]3 years ago

4 0

The answer is 0.45 Change to a common denominator.
1/5 and 1/4 can be changed to 4/20 and 5/20
However, the only values between 4 and 5 are fractions.
for example: 4.5/20 = 9/40
This would require further simplifying.

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3 years ago

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Read 2 more answers

Find the exact value of the expression. Sin 265 cos 25 - cos 265 sin 25

DerKrebs [107]

Answer:

$\sin(265\degree) \cos(25\degree)-\sin(265\degree) \cos(25\degree)=-\frac{\sqrt{3}}{2}$

Step-by-step explanation:

Recall that;

$\sin(A) \cos(B)-\sin(B) \cos(A)=\sin(A-B)$

This implies that;

$\sin(265\degree) \cos(25\degree)-\sin(265\degree) \cos(25\degree)=\sin(265\degree-25\degree)$

$\sin(265\degree) \cos(25\degree)-\sin(265\degree) \cos(25\degree)=\sin(240\degree)$

$\sin(265\degree) \cos(25\degree)-\sin(265\degree) \cos(25\degree)=\sin(180\degree+60\degree)$

$\sin(265\degree) \cos(25\degree)-\sin(265\degree) \cos(25\degree)=-\sin(60\degree)$

$\sin(265\degree) \cos(25\degree)-\sin(265\degree) \cos(25\degree)=-\frac{\sqrt{3}}{2}$

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3 years ago

A bookstore had 60 copies of a magazine. Yesterday, it sold 2/3 of them. Today, it sold 4/5 of what remained. How many copies do

laiz [17]

Answer:

4 copies

Step-by-step explanation:

After yesterday's sales, 1/3 of the original supply remained. After today's sales, 1/5 of that value remain. So the remaining number is ...

60·(1/3)(1/5) = 60/15 = 4

4 0

3 years ago