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grigory [225]
2 years ago
6

1/5divided by (-5/7)

Mathematics
2 answers:
galina1969 [7]2 years ago
4 0

Answer:

-7/25

Step-by-step explanation:

1/5 \div -5/7

Do the reciprocal of the second fraction.

1/5 \times 7/-5

Multiply the first fraction by the reciprocal of the second fraction.

7/-25=-0.28

The answer in decimal form is -0.28.

pshichka [43]2 years ago
3 0

Answer:

-0.28

Step-by-step explanation:

(1/5) : (-5/7)=(1*5)/(5*(-5))=-(7/25)=-0.28

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Lilly only needed to cut off 15 feet.

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Answer:

2,160 pencils

Step-by-step explanation:

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What is the coefficient of the x5y5-term in the binomial expansion of (2x – 3y)10? 10C5(2)5(3)5 10C5(2)5(–3)5 –10C5(2)5(–3)5 10C
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ANSWER

10C_5(2)^{5}( - 3)^5

EXPLANATION

The given binomial expansion is:

{(2x - 3y)}^{10}

Compare this to

{(a + b)}^{n}

we have a=2x , b=-3y and n=10

We want to find the coefficient of the term

{x}^{5}  {y}^{5}

This implies that, r=5.

The terms in the expansion can be obtained using

T_{r+1}=nC_ra^{n-r}b^r

We substitute the given values to obtain;

T_{5+1}=10C_5(2x)^{10-5}(  - 3y)^5

T_{6}=10C_5(2x)^{5}(3y)^5

T_{6}=10C_5(2)^{5}( - 3)^5 {x}^{5}  {y}^{5}

Hence the coefficient is;

10C_5(2)^{5}( - 3)^5

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