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2 years ago

X-7y=-21 2x - 14y = -42 What’s the solution

Mathematics

1 answer:

maxonik [38]2 years ago

7 0

Answer:

Step-by-step explanation:

i tried but i cant succed.

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What is the coefficient of the x9y-term in the binomial expansion of (2y + 4x3)4? 4 32 128 512

Nesterboy [21]

512 is the coefficient of the x9y-term

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2 years ago

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If you are one of the first 100 people to join a new health club, you are charged a joining fee of $49. Otherwise, you are charg

Drupady [299]

Answer:

a) Total cost = 49 + 38.75m

b) Total cost = 149 + 38.75m

c) The graphs of the lines are parallel and both has slope of - 2.5

d)Difference in total cost = $132.5

Step-by-step explanation:

Total cost , TC = Initial membership fee + monthly charges

a) TC = 49 + 38.75m

b)TC = 149 + 38.75m

d) 149 + 38.75(6months) = 381.5

49 + 38.75(12months) = 514

Difference in total cost = 514 -381.5 = $132.5

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2 years ago

Holly's fitness tracker shows how many

Dafna11 [192]

Holly would have to climb 92 flights of stairs in the fifth week

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2 years ago

If g (x) = StartFraction x + 1 Over x minus 2 EndFraction and h(x) = 4 – x, what is the value of (g circle h) (negative 3)? Eigh

brilliants [131]

Answer:

Step-by-step explanation:

Given g (x) = $\frac{x+1}{x-2}$ and $h(x) = 4-x$ , we are to find $(goh)(-3)$

First we need to get $(goh)(x)$

$(goh)(x) = g(h(x))\\g(h(x))= g(4-x)\\g(4-x) = \frac{(4-x)+1}{(4-x)-2}\\ g(4-x) = \frac{5-x}{2-x}\\substitute \ x = -3 \ into \ resulting \ function\\ g(4-x) = \frac{5-x}{2-x}\\(goh)(-3) = \frac{5-(-3)}{2-(-3)}\\\\(goh)(-3) = \frac{8}{5}\\$

Hence $(goh)(x)\ is \ Eight-fifths$

Also given f(x) = x and g(x) = 1/x, we are to find $(fog)(x)$

$(fog)(x) = f(g(x))\\f(g(x)) = f(\frac{1}{x} )\\ since \ f(x) = x^2, we\ will \ repalce\ x \ with \ \frac{1}{x} \ to \ have;\\ f(\frac{1}{x} ) =( \frac{1}{x})^2\\\\$

$f(\frac{1}{x} ) = \frac{1}{x^2}$

For the pair of function f(x) = 2/x and g(x) = 2/x

f(g(x)) = f(2/x)

f(2/x) = 2/(2/x)

f(2/x) = 2*x/2

f(2/x) = x

Hence f(g(x)) = x

For the pair of function f(x) = x-2/3 and g(x) = 2-3x

f(g(x)) = f(2-3x)

f(2-3x) = (2-3x-2)/3

f(2-3x) = -3x/3

f(2-3x) = -x

f(g(x)) = -x for the pair of function

For the pair of function f(x) = x/2 - 2 and g(x) = x/2 + 2

f(g(x)) = f(x/2 + 2)

f(x/2 + 2) = f((x+4)/2)

f((x+4)/2) = [(x+4)/2]/2 - 2

f((x+4)/2) = (x+4)/4 - 2

find the LCM

f((x+4)/2) = [(x+4)-8]/4

f((x+4)/2) = (x-4)/4

Hence f(g(x)) for the pair of function is (x-4)/4

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2 years ago

According to the Rational Roots Theorem, which statement about f(x) = 25x7 – x6 – 5x4 + x – 49 is true? Any rational root of f(x

Darya [45]

Answer:

Any rational root of f(x) is a factor of -49 divided by a factor of 25

Step-by-step explanation:

The Rational Roots Theorem states that, given a polynomial

$p(x) = a_nx^n+a_{n-1}x^{n-1}+\ldots+a_2x^2+a_1x+a_0$

the possible rational roots are in the form

$x=\dfrac{p}{q},\quad p\text{ divides } a_0,\quad q\text{ divides } a_n$

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2 years ago

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