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3 years ago

I really need help with this

Mathematics

1 answer:

Arada [10]3 years ago

7 0

Hi!
So I I hope this helps!

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B=3x+9xy solv for x

IrinaVladis [17]

The answer is B = 12 x

8 0

4 years ago

Read 2 more answers

A function f is defined by f(x) = 1 + 6x + x2 + 6x3 + x4 + ⋯ that is, its coefficients are c2n = 1 and c2n + 1 = 6 for all n ≥ 0

Alenkinab [10]

From the odd-degree terms, take out one copy and rewrite the series as

$1+6x+x^2+6x^3+\cdots=(1+x+x^2+x^3+\cdots)+5x+5x^3+\cdots$

$1+6x+x^2+6x^3+\cdots=(1+x+x^2+x^3+\cdots)+5x(1+x^2+\cdots)$

Then if |x| < 1, we can condense this to

$\displaystyle\sum_{n=0}^\infty x^n+5x\sum_{n=0}^\infty x^{2n}=\frac1{1-x}+\frac{5x}{1-x^2}=\frac{1+6x}{1-x^2}$

Since the series we invoked here converge on -1 < x < 1, so does this one.

4 0

3 years ago

A fair spinner has 12 equal sections: 5 red 4 blue and 3 green. its Spun twice what is the probability of getting the same colou

VLD [36.1K]

Answer:

25/72

Step-by-step explanation:

P( blue) = blue / total = 4/12 = 1/3

P ( blue, blue) = 1/3 * 1/3 = 1/9

P ( red) = red / total = 5/12

P ( red, red) = 5/12 * 5/12 = 25/144

P ( green) = green /total = 3/12 =1/4

P ( green , green) = 1/4 * 1/4 = 1/16

Add these together to get

P( same colour twice) = 1/9+ 25/144 + 1/16

=16/144 + 25/144 + 9/144

=50/144

=25/72

4 0

3 years ago

Find value of x and y 2.) 4x+13y=40 4x+3y=-40

stiks02 [169]

$\left\{\begin{array}{ccc}4x+13y=40\\4x+3y=-40&/\cdot(-1)\end{array}\right\\+\left\{\begin{array}{ccc}4x+13y=40\\-4x-3y=40\end{array}\right\\-----------\\.\ \ \ \ \ \ 10y=80\ \ \ \ /:10\\.\ \ \ \ \ \ y=8\\\\4x+3\cdot8=-40\\4x+24=-40\\4x=-40-24\\4x=-64\ \ \ \ /:4\\x=-16\\\\Solution:x=-16\ and\ y=8.$

7 0

4 years ago

Read 2 more answers

Good afternoon everyone Evaluate the expression for b = –14. b + 4 =

Viefleur [7K]

Answer: [b + 4 = -10]

Step-by-step explanation: We are given the equation b = -14 and told to, given this information, evaluate b + 4 = ? and find ?. Given b = -14 we can plug in -14 for b in b + 4 = ?. This gives us -14 + 4 = ?. Adding this up gives us the answer of -10. Hope that this makes sense and helps, and good afternoon to you!

-Show work-

$b=-14\\(b)+4=?$

$(-14)+4=?$

$10 = ?\\?=10$

4 0

3 years ago

I really need help with this ​

I really need help with this