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3 years ago

Three more than x is equal to 47. Find x.

Mathematics

2 answers:

sweet [91]3 years ago

8 0

Answer:

Step-by-step explanation:

Ion know tbh

ki77a [65]3 years ago

6 0

Answer: I think it would be 44 because three more than 44 + 3 equals 47, but I might be wrong. I also think it could be 50.

Step-by-step:

more than symbol is >

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Karolina [17]

Answer:

The coefficient of a²b³c is -720

Step-by-step explanation:

Given: $(2a-b+3c)^6$

Let 2a-b = x and 3c = y

$(x+y)^6$

General term of binomial expansion.

$T_{r+1}=^nC_rx^{n-r}y^r$

where, n=6 , r=1 ( because exponent of c is 1)

$\Rightarrow ^6C_1x^{6-1}y^1$

$\Rightarrow 6(2a-b)^{5}3c$ $\because y=3c, x=2a-b$

$\Rightarrow 18(2a-b)^{5}c$ ----------(1)

Now, we simplify (2a-b)⁵

$T_{r+1}=^5C_r(2a)^{5-r}(-b)^r$

The exponent of b is 3 and a is 2 .

If we take r=3 will get exponent of b is 3 and a is 2

So, put r=3

$T_{4}=^5C_3(2a)^{2}(-b)^3=-40a^2b^3$

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4 years ago

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