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Elis [28]
3 years ago
11

I need to know the sum of -3/5+(-2/3)

Mathematics
2 answers:
adoni [48]3 years ago
5 0

Answer:

1 4/15

That's what i think!

good luck :)

zloy xaker [14]3 years ago
4 0

Answer:

-3/5+(-2/3) = 19/15

Step-by-step explanation:

You must make a common denominator for 5 and 3, so you find the least common multiple, 15. then you multiply the denominators by  each other. 3 for the first and 5 for the second.  then you multiply the numerator by the same. Hope this helped.

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What's 1+1? (Free Points)
kykrilka [37]

Answer:

2

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
A carpenter wants to cut a board 16 1/2 feet in length into 1 7/8 feet pieces. How many pieces can be cut from the board? The ca
yawa3891 [41]
<h3>Answer:</h3>
  • 8 pieces
  • 3/8 foot
<h3>Explanation:</h3>

a) Let n represent the number of 1 7/8 ft pieces. Then we have ...

... 16 1/2 ft = n × (1 7/8 ft)

We can find n by dividing this equation by 1 7/8.

... (16 1/2)/(1 7/8) = n = (132/8)/(15/8) = 132/15

... n = 8 12/15 = 8 4/5

The integer number of pieces that can be cut is 8 pieces.

b) The length of the left-over piece is 4/5 of the full length of a piece, so is ...

... (4/5) × (15/8 ft) = 12/8 ft

We want to divide this into 4 equal lengths, so each of those lengths will be 1/4 of the length of the left-over:

... (1/4) × (12/8 ft) = 3/8 ft

_____

<em>Comment on arithmetic with fractions</em>

This problem is easier if you <em>convert the mixed numbers to improper fractions</em>. This is done by expressing the integer as a number of fractional parts, then adding the fraction part of the mixed number:

... a + b/c = (a×c/c) + b/c = (ac +b)/c

Division with fractions is taught a couple of different ways. One way you can do it is to "invert and multiply". That is, you multiply the numerator fraction by the reciprocal of the denominator fraction:

... (a/b)/(c/d) = (a/b)×(d/c)

Another way you can do the division is to express each of the numerator and denominator fractions over the same denominator. Then the quotient is the ratio of numerators.

... (a/c)/(b/c) = a/b

This is the method we used here. Effectively, we converted 16 1/2 to 16 4/8 then to (16×8 +4)/8 = 132/8. Then the numerator and denominator fractions both had denominators of 8, so (132/8)/(15/8) = 132/15. This fraction can be reduced by removing a factor of 3 from numerator and denominator to give ...

... 132/15 = 44/5 = 8 4/5

7 0
3 years ago
Factor completely 4u^2-28u+49
aleksandrvk [35]

Assignment: \bold{Factor \ 4u^2-28u+49}

<><><><><>

Answer: \boxed{\bold{\left(2u-7\right)^2}}

<><><><><>

Explanation: \downarrow\downarrow\downarrow

<><><><><>

[ Step One ] Rewrite \bold{4u^2-28u+49}

\bold{\left(2u\right)^2-2\cdot \:2u\cdot \:7+7^2}

[ Step Two ] Apply perfect square formula

Note: Perfect Square Formula: \bold{\left(a-b\right)^2=a^2-2ab+b^2}

\bold{a=2u,\:b=7}

\bold{\left(2u-7\right)^2}

<><><><><><><>

\bold{\rightarrow Rhythm \ Bot \leftarrow}

6 0
3 years ago
Six years after a tree was planted, its height was 7 feet. Nine years after it was planted, its height was 16 feet. Which of the
horrorfan [7]
It is 
y-16=3(x-9)
y=3x-11 
b & c
7 0
3 years ago
Read 2 more answers
If you can help press on this
GenaCL600 [577]
It is rational because any number that can be represented in a fraction is rational. 4/33 is a fraction, so it is rational.
8 0
3 years ago
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