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3 years ago

Find (hog)(-2) h(x) = 3x g(x) = 4x + 1

Mathematics

1 answer:

LenKa [72]3 years ago

3 0

Answer:

h(-2)=-6

g(2)=-7

Step-by-step explanation:

Just plug 2 in for x and solve the equation.

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2x² - 5x+1 has roots alpha and beta. Find alpha⁴+beta⁴ without solving the equation.

shepuryov [24]

Answer:

Step-by-step explanation:

$\alpha+\beta=\dfrac{5}{2} \\\\\alpha*\beta=\dfrac{1}{2} \\\\\alpha^2+\beta^2=\dfrac{21}{4} \ (see\ previous\ post)\\\\(\alpha+\beta)^4=\dfrac{625}{16} \\\\=\alpha^4+\beta^4+4*\alpha^3*\beta+6*\alpha^2*\beta^2+4*\alpha*\beta^3\\\\=\alpha^4+\beta^4+4*(\alpha*\beta)(\alpha^2+\beta^2)+6*\alpha^2*\beta^2\\\\\alpha^4+\beta^4=(\alpha+\beta)^4-4*(\alpha*\beta)(\alpha^2+\beta^2)-6*\alpha^2*\beta^2\\\\= \dfrac{625}{16} -4*\dfrac{1}{2} *\dfrac{21}{4} -6*(\dfrac{1}{2})^2 \\\\$

$= \dfrac{625}{16}- \dfrac{168}{16}-\dfrac{24}{16}\\\\\\= \dfrac{433}{16}$

7 0

2 years ago

Solve for x.

kumpel [21]

Divide by 1.8
x = around 35.56

6 0

2 years ago

Read 2 more answers

If the areas of the given pairs of shapes are equal, find the value of x.

den301095 [7]

Answer:

$x = 8cm$

Step-by-step explanation:

we are given a square and rectangle.we want to figure out x which is the width of the rectangle. we are also given a condition i.e

the area of the square equal to the area of the rectangle

therefore,

$\displaystyle \rm A _{square } = A _{rect}$

recall the formula of the area of square and rectangle so,

$\displaystyle {s}^{2} = lw$

now assign variables

$s \implies16cm$
$l \implies32cm$
$w \implies x$

thus substitute:

$\displaystyle 32cmx = {16cm}^{2}$

simplify square:

$\displaystyle 32cmx = 256cm^2$

divide both sides by 32:

$\displaystyle \boxed{x = 8cm}$

and we're done!

3 0

2 years ago

Read 2 more answers

Please answer this correctly

Brrunno [24]

Answer:

50%

Step-by-step explanation:

The chances of getting either heads or tails on a coin is 50/50. Convert that to probability and that is 1/2. Convert it to percentage of 100 and it is 50%.

Only time a coin isn't 50/50 is if the coin itself is a weighted coin.

5 0

3 years ago

Pweeb help for brainliest

stellarik [79]

Answer:

The correct answer is B

Step-by-step explanation:

2(x-1) + 5x = x-8

Firstly, break all the brackets and you would got:

2x - 2 + 5x = x - 8

Put x into 1 side,

2x + 5x - x = -8 + 2

6x = -6

Divide both side by 6,

6x / 6 = -6/6

x = -1

The correct answer is B

Hope this help you :3

5 0

3 years ago

Read 2 more answers