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Katen [24]
3 years ago
5

Value of x Give reasons

Mathematics
1 answer:
Airida [17]3 years ago
7 0
50 bc since all the angles in a triangle are 180 degrees the other angle in the complete triangle is 40 degrees and since the lines are parallel it would be a corresponding angle to the angle beside x, then you would take 90+40 +x= 180 bc it’s a straight angle
you would get 50
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Step-by-step explanation:

Let's set up a proportion and cross multiply.

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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
butalik [34]

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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